/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 13:49:44,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 13:49:44,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 13:49:44,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 13:49:44,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 13:49:44,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 13:49:44,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 13:49:44,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 13:49:44,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 13:49:44,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 13:49:44,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 13:49:44,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 13:49:44,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 13:49:44,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 13:49:44,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 13:49:44,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 13:49:44,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 13:49:44,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 13:49:44,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 13:49:44,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 13:49:44,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 13:49:44,408 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 13:49:44,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 13:49:44,409 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 13:49:44,409 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 13:49:44,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 13:49:44,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 13:49:44,412 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 13:49:44,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 13:49:44,413 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 13:49:44,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 13:49:44,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 13:49:44,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 13:49:44,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 13:49:44,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 13:49:44,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 13:49:44,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 13:49:44,415 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 13:49:44,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 13:49:44,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 13:49:44,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 13:49:44,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 13:49:44,417 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 13:49:44,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 13:49:44,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 13:49:44,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 13:49:44,746 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 13:49:44,748 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 13:49:44,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl [2021-05-03 13:49:44,748 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/loop-tiling-eq.wvr.bpl' [2021-05-03 13:49:44,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 13:49:44,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 13:49:44,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 13:49:44,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 13:49:44,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 13:49:44,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 13:49:44,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,816 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 13:49:44,816 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 13:49:44,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 13:49:44,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (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 [2021-05-03 13:49:44,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 13:49:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 13:49:44,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 13:49:44,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 13:49:44,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 13:49:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 13:49:44,898 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 13:49:44,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 13:49:44,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 13:49:44,899 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 13:49:45,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 13:49:45,179 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-03 13:49:45,180 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 13:49:45,180 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 13:49:45,181 INFO L202 PluginConnector]: Adding new model loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:45 BoogieIcfgContainer [2021-05-03 13:49:45,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 13:49:45,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 13:49:45,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 13:49:45,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 13:49:45,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/2) ... [2021-05-03 13:49:45,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5af8f91d and model type loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 01:49:45, skipping insertion in model container [2021-05-03 13:49:45,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "loop-tiling-eq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:45" (2/2) ... [2021-05-03 13:49:45,188 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-tiling-eq.wvr.bpl [2021-05-03 13:49:45,192 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 13:49:45,192 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 13:49:45,196 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 13:49:45,196 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 13:49:45,251 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 13:49:45,274 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 13:49:45,302 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 13:49:45,302 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 13:49:45,302 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 13:49:45,302 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 13:49:45,303 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 13:49:45,303 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 13:49:45,303 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 13:49:45,304 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 13:49:45,313 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 22 places, 18 transitions, 52 flow [2021-05-03 13:49:45,323 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 13:49:45,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,330 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash -37685658, now seen corresponding path program 1 times [2021-05-03 13:49:45,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203741467] [2021-05-03 13:49:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,418 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:45,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626500997] [2021-05-03 13:49:45,419 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 [2021-05-03 13:49:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:49:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203741467] [2021-05-03 13:49:45,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:45,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626500997] [2021-05-03 13:49:45,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:45,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 13:49:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938700111] [2021-05-03 13:49:45,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 13:49:45,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 13:49:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 13:49:45,646 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-05-03 13:49:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,688 INFO L93 Difference]: Finished difference Result 36 states and 75 transitions. [2021-05-03 13:49:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 13:49:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2021-05-03 13:49:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,700 INFO L225 Difference]: With dead ends: 36 [2021-05-03 13:49:45,700 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 13:49:45,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 13:49:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-05-03 13:49:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 54 transitions. [2021-05-03 13:49:45,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 54 transitions. Word has length 10 [2021-05-03 13:49:45,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,742 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 54 transitions. [2021-05-03 13:49:45,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2021-05-03 13:49:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 54 transitions. [2021-05-03 13:49:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 13:49:45,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,745 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-03 13:49:45,968 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1889973719, now seen corresponding path program 1 times [2021-05-03 13:49:45,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841400656] [2021-05-03 13:49:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,976 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:45,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908354748] [2021-05-03 13:49:45,977 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 [2021-05-03 13:49:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841400656] [2021-05-03 13:49:46,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:46,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908354748] [2021-05-03 13:49:46,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:46,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 13:49:46,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949507493] [2021-05-03 13:49:46,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 13:49:46,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 13:49:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 13:49:46,086 INFO L87 Difference]: Start difference. First operand 27 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,133 INFO L93 Difference]: Finished difference Result 44 states and 95 transitions. [2021-05-03 13:49:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 13:49:46,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have 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 [2021-05-03 13:49:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,134 INFO L225 Difference]: With dead ends: 44 [2021-05-03 13:49:46,135 INFO L226 Difference]: Without dead ends: 31 [2021-05-03 13:49:46,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-03 13:49:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-03 13:49:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 62 transitions. [2021-05-03 13:49:46,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 62 transitions. Word has length 12 [2021-05-03 13:49:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,140 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 62 transitions. [2021-05-03 13:49:46,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 62 transitions. [2021-05-03 13:49:46,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 13:49:46,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,140 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,341 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1513355601, now seen corresponding path program 1 times [2021-05-03 13:49:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226804986] [2021-05-03 13:49:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,346 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:46,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89456690] [2021-05-03 13:49:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226804986] [2021-05-03 13:49:46,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89456690] [2021-05-03 13:49:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-03 13:49:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844870352] [2021-05-03 13:49:46,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:49:46,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:49:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:46,475 INFO L87 Difference]: Start difference. First operand 31 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-05-03 13:49:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,541 INFO L93 Difference]: Finished difference Result 63 states and 124 transitions. [2021-05-03 13:49:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 13:49:46,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 13 [2021-05-03 13:49:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,542 INFO L225 Difference]: With dead ends: 63 [2021-05-03 13:49:46,543 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 13:49:46,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 13:49:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 13:49:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 77 transitions. [2021-05-03 13:49:46,548 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 77 transitions. Word has length 13 [2021-05-03 13:49:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,548 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 77 transitions. [2021-05-03 13:49:46,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-05-03 13:49:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 77 transitions. [2021-05-03 13:49:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:46,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,549 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,773 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1697007933, now seen corresponding path program 1 times [2021-05-03 13:49:46,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536708947] [2021-05-03 13:49:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,781 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:46,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202966870] [2021-05-03 13:49:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:46,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:46,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:46,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:46,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:7 [2021-05-03 13:49:46,967 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:46,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:46,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:46,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:46,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:46,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:46,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:46,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-05-03 13:49:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536708947] [2021-05-03 13:49:47,058 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:47,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202966870] [2021-05-03 13:49:47,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:47,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679203733] [2021-05-03 13:49:47,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:47,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:47,060 INFO L87 Difference]: Start difference. First operand 38 states and 77 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,202 INFO L93 Difference]: Finished difference Result 63 states and 135 transitions. [2021-05-03 13:49:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,207 INFO L225 Difference]: With dead ends: 63 [2021-05-03 13:49:47,208 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 13:49:47,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 13:49:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-05-03 13:49:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.130434782608696) internal successors, (98), 46 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 98 transitions. [2021-05-03 13:49:47,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 98 transitions. Word has length 14 [2021-05-03 13:49:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,215 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 98 transitions. [2021-05-03 13:49:47,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 98 transitions. [2021-05-03 13:49:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,216 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,421 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash 714269481, now seen corresponding path program 2 times [2021-05-03 13:49:47,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459418440] [2021-05-03 13:49:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,426 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:47,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688646640] [2021-05-03 13:49:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:47,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:47,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:47,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:47,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:47,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:47,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:47,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:47,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:47,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:47,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:47,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:47,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:47,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459418440] [2021-05-03 13:49:47,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688646640] [2021-05-03 13:49:47,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:47,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:47,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575475411] [2021-05-03 13:49:47,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:47,635 INFO L87 Difference]: Start difference. First operand 47 states and 98 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,728 INFO L93 Difference]: Finished difference Result 59 states and 121 transitions. [2021-05-03 13:49:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:47,729 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:47,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,729 INFO L225 Difference]: With dead ends: 59 [2021-05-03 13:49:47,730 INFO L226 Difference]: Without dead ends: 56 [2021-05-03 13:49:47,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:47,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-03 13:49:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-03 13:49:47,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 109 transitions. [2021-05-03 13:49:47,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 109 transitions. Word has length 14 [2021-05-03 13:49:47,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,736 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 109 transitions. [2021-05-03 13:49:47,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 109 transitions. [2021-05-03 13:49:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:47,736 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,737 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,953 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1862354109, now seen corresponding path program 3 times [2021-05-03 13:49:47,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608147775] [2021-05-03 13:49:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,957 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:47,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484111485] [2021-05-03 13:49:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:48,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:48,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:49:48,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:48,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:48,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:48,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:48,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:48,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2021-05-03 13:49:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608147775] [2021-05-03 13:49:48,275 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:48,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484111485] [2021-05-03 13:49:48,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:48,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:49:48,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608583644] [2021-05-03 13:49:48,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:48,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:48,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:48,277 INFO L87 Difference]: Start difference. First operand 52 states and 109 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,438 INFO L93 Difference]: Finished difference Result 72 states and 148 transitions. [2021-05-03 13:49:48,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:49:48,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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 14 [2021-05-03 13:49:48,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,440 INFO L225 Difference]: With dead ends: 72 [2021-05-03 13:49:48,440 INFO L226 Difference]: Without dead ends: 66 [2021-05-03 13:49:48,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-03 13:49:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2021-05-03 13:49:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 113 transitions. [2021-05-03 13:49:48,446 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 113 transitions. Word has length 14 [2021-05-03 13:49:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 113 transitions. [2021-05-03 13:49:48,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 113 transitions. [2021-05-03 13:49:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:48,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,447 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:48,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,661 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:48,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:48,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1843920083, now seen corresponding path program 4 times [2021-05-03 13:49:48,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:48,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321551214] [2021-05-03 13:49:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:48,666 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:48,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795579557] [2021-05-03 13:49:48,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:48,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:48,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:48,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:48,782 INFO L446 ElimStorePlain]: Different costs {0=[v_A_15], 1=[F]} [2021-05-03 13:49:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:48,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,799 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:48,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-05-03 13:49:48,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:48,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:48,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-05-03 13:49:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321551214] [2021-05-03 13:49:48,869 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:48,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795579557] [2021-05-03 13:49:48,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:48,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:48,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915277003] [2021-05-03 13:49:48,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:48,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:48,871 INFO L87 Difference]: Start difference. First operand 53 states and 113 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,964 INFO L93 Difference]: Finished difference Result 68 states and 145 transitions. [2021-05-03 13:49:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,965 INFO L225 Difference]: With dead ends: 68 [2021-05-03 13:49:48,965 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 13:49:48,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 13:49:48,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2021-05-03 13:49:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2021-05-03 13:49:48,970 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 14 [2021-05-03 13:49:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,971 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2021-05-03 13:49:48,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2021-05-03 13:49:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:48,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,972 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:49,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,185 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash -527762779, now seen corresponding path program 5 times [2021-05-03 13:49:49,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:49,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795455953] [2021-05-03 13:49:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:49,189 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:49,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311238570] [2021-05-03 13:49:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:49:49,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:49,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:49,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:49,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:49,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:49:49,290 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:49,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:49,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:49,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-05-03 13:49:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795455953] [2021-05-03 13:49:49,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:49,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311238570] [2021-05-03 13:49:49,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:49,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:49,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216076416] [2021-05-03 13:49:49,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:49,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:49,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:49,374 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:49,463 INFO L93 Difference]: Finished difference Result 72 states and 155 transitions. [2021-05-03 13:49:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:49,464 INFO L225 Difference]: With dead ends: 72 [2021-05-03 13:49:49,464 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 13:49:49,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 13:49:49,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-05-03 13:49:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.2222222222222223) internal successors, (120), 54 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 120 transitions. [2021-05-03 13:49:49,468 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 120 transitions. Word has length 14 [2021-05-03 13:49:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:49,468 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 120 transitions. [2021-05-03 13:49:49,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 120 transitions. [2021-05-03 13:49:49,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:49,469 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:49,469 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:49,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-03 13:49:49,691 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash 545322601, now seen corresponding path program 6 times [2021-05-03 13:49:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:49,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125918715] [2021-05-03 13:49:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:49,696 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:49,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590301699] [2021-05-03 13:49:49,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:49:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:49,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 13:49:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:49,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:49:49,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 13:49:49,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:49,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:49,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:49,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:22 [2021-05-03 13:49:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125918715] [2021-05-03 13:49:49,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:49,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590301699] [2021-05-03 13:49:49,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:49,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:49,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462400710] [2021-05-03 13:49:49,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:49,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:49,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:49,888 INFO L87 Difference]: Start difference. First operand 55 states and 120 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:50,039 INFO L93 Difference]: Finished difference Result 94 states and 200 transitions. [2021-05-03 13:49:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:50,041 INFO L225 Difference]: With dead ends: 94 [2021-05-03 13:49:50,042 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 13:49:50,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 13:49:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 58. [2021-05-03 13:49:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.280701754385965) internal successors, (130), 57 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2021-05-03 13:49:50,057 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 14 [2021-05-03 13:49:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:50,058 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2021-05-03 13:49:50,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2021-05-03 13:49:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:50,058 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:50,058 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,283 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash -423779803, now seen corresponding path program 7 times [2021-05-03 13:49:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307195241] [2021-05-03 13:49:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:50,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883636164] [2021-05-03 13:49:50,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:50,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:50,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:49:50,366 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:50,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:50,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:50,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,383 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-05-03 13:49:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307195241] [2021-05-03 13:49:50,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883636164] [2021-05-03 13:49:50,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:50,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80271506] [2021-05-03 13:49:50,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:50,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:50,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:50,436 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:50,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:50,578 INFO L93 Difference]: Finished difference Result 90 states and 199 transitions. [2021-05-03 13:49:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:50,580 INFO L225 Difference]: With dead ends: 90 [2021-05-03 13:49:50,580 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 13:49:50,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 13:49:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2021-05-03 13:49:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.280701754385965) internal successors, (130), 57 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 130 transitions. [2021-05-03 13:49:50,587 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 130 transitions. Word has length 14 [2021-05-03 13:49:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:50,589 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 130 transitions. [2021-05-03 13:49:50,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 130 transitions. [2021-05-03 13:49:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:50,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:50,590 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,805 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2065847619, now seen corresponding path program 8 times [2021-05-03 13:49:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039276058] [2021-05-03 13:49:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:50,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638345083] [2021-05-03 13:49:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:50,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:50,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:50,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:50,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:50,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:50,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:50,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:50,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:50,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039276058] [2021-05-03 13:49:50,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:50,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638345083] [2021-05-03 13:49:50,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:50,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:50,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682802517] [2021-05-03 13:49:50,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:50,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:50,963 INFO L87 Difference]: Start difference. First operand 58 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:51,043 INFO L93 Difference]: Finished difference Result 104 states and 229 transitions. [2021-05-03 13:49:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:51,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:51,045 INFO L225 Difference]: With dead ends: 104 [2021-05-03 13:49:51,045 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 13:49:51,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 13:49:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-05-03 13:49:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.283333333333333) internal successors, (137), 60 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 137 transitions. [2021-05-03 13:49:51,048 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 137 transitions. Word has length 14 [2021-05-03 13:49:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:51,048 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 137 transitions. [2021-05-03 13:49:51,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 137 transitions. [2021-05-03 13:49:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:51,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:51,049 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 13:49:51,270 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2084281645, now seen corresponding path program 9 times [2021-05-03 13:49:51,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318833409] [2021-05-03 13:49:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,274 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:51,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738364232] [2021-05-03 13:49:51,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:51,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:49:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:51,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:51,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:51,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:51,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:49:51,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2021-05-03 13:49:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318833409] [2021-05-03 13:49:51,454 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738364232] [2021-05-03 13:49:51,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:51,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:49:51,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551295882] [2021-05-03 13:49:51,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:51,455 INFO L87 Difference]: Start difference. First operand 61 states and 137 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:51,603 INFO L93 Difference]: Finished difference Result 106 states and 235 transitions. [2021-05-03 13:49:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:49:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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 14 [2021-05-03 13:49:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:51,604 INFO L225 Difference]: With dead ends: 106 [2021-05-03 13:49:51,604 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 13:49:51,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:49:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 13:49:51,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2021-05-03 13:49:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 140 transitions. [2021-05-03 13:49:51,608 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 140 transitions. Word has length 14 [2021-05-03 13:49:51,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:51,608 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 140 transitions. [2021-05-03 13:49:51,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:51,608 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 140 transitions. [2021-05-03 13:49:51,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:51,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:51,609 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,829 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash -492341945, now seen corresponding path program 10 times [2021-05-03 13:49:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186921678] [2021-05-03 13:49:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212707679] [2021-05-03 13:49:51,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:51,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:51,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:51,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:51,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:49:51,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:51,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:51,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186921678] [2021-05-03 13:49:51,980 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:51,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212707679] [2021-05-03 13:49:51,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:51,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:51,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582930932] [2021-05-03 13:49:51,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:51,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:51,981 INFO L87 Difference]: Start difference. First operand 62 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,110 INFO L93 Difference]: Finished difference Result 122 states and 266 transitions. [2021-05-03 13:49:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,111 INFO L225 Difference]: With dead ends: 122 [2021-05-03 13:49:52,111 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 13:49:52,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:52,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 13:49:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 62. [2021-05-03 13:49:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 61 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 140 transitions. [2021-05-03 13:49:52,114 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 140 transitions. Word has length 14 [2021-05-03 13:49:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,114 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 140 transitions. [2021-05-03 13:49:52,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 140 transitions. [2021-05-03 13:49:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:52,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,115 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-03 13:49:52,325 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1166331455, now seen corresponding path program 11 times [2021-05-03 13:49:52,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085883422] [2021-05-03 13:49:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,328 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:52,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982593470] [2021-05-03 13:49:52,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:52,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:52,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:52,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:52,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:52,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:49:52,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,464 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085883422] [2021-05-03 13:49:52,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:52,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982593470] [2021-05-03 13:49:52,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:52,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:52,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611842564] [2021-05-03 13:49:52,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:52,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:52,496 INFO L87 Difference]: Start difference. First operand 62 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:52,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,595 INFO L93 Difference]: Finished difference Result 87 states and 197 transitions. [2021-05-03 13:49:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:52,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,596 INFO L225 Difference]: With dead ends: 87 [2021-05-03 13:49:52,596 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 13:49:52,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 13:49:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-05-03 13:49:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 63 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 146 transitions. [2021-05-03 13:49:52,599 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 146 transitions. Word has length 14 [2021-05-03 13:49:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,599 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 146 transitions. [2021-05-03 13:49:52,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 146 transitions. [2021-05-03 13:49:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:52,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,600 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,812 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1410292135, now seen corresponding path program 12 times [2021-05-03 13:49:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140357316] [2021-05-03 13:49:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,816 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:52,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921460381] [2021-05-03 13:49:52,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:49:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:52,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:52,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:52,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:52,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:52,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140357316] [2021-05-03 13:49:53,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:53,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921460381] [2021-05-03 13:49:53,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:53,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:53,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350897114] [2021-05-03 13:49:53,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:53,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:53,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:53,011 INFO L87 Difference]: Start difference. First operand 64 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:53,104 INFO L93 Difference]: Finished difference Result 97 states and 222 transitions. [2021-05-03 13:49:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:53,105 INFO L225 Difference]: With dead ends: 97 [2021-05-03 13:49:53,105 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 13:49:53,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 13:49:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-05-03 13:49:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-05-03 13:49:53,108 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-05-03 13:49:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:53,108 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-05-03 13:49:53,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-05-03 13:49:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:53,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:53,109 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 13:49:53,313 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1391858109, now seen corresponding path program 13 times [2021-05-03 13:49:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918880683] [2021-05-03 13:49:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,316 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:53,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895618840] [2021-05-03 13:49:53,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:53,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:49:53,395 INFO L446 ElimStorePlain]: Different costs {0=[v_A_24], 1=[F]} [2021-05-03 13:49:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:53,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,407 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-05-03 13:49:53,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-05-03 13:49:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918880683] [2021-05-03 13:49:53,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:53,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895618840] [2021-05-03 13:49:53,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:53,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:53,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917942677] [2021-05-03 13:49:53,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:53,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:53,457 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:53,555 INFO L93 Difference]: Finished difference Result 92 states and 212 transitions. [2021-05-03 13:49:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:53,557 INFO L225 Difference]: With dead ends: 92 [2021-05-03 13:49:53,557 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 13:49:53,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 13:49:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-05-03 13:49:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-05-03 13:49:53,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-05-03 13:49:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:53,560 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-05-03 13:49:53,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-05-03 13:49:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:53,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:53,560 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 13:49:53,781 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,781 INFO L82 PathProgramCache]: Analyzing trace with hash 90620299, now seen corresponding path program 14 times [2021-05-03 13:49:53,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19492148] [2021-05-03 13:49:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,784 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:53,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360379695] [2021-05-03 13:49:53,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:53,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:53,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:53,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:53,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:53,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:53,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:53,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19492148] [2021-05-03 13:49:53,920 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:53,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360379695] [2021-05-03 13:49:53,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:53,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:53,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643494558] [2021-05-03 13:49:53,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:53,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:53,923 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:54,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:54,024 INFO L93 Difference]: Finished difference Result 85 states and 190 transitions. [2021-05-03 13:49:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:54,025 INFO L225 Difference]: With dead ends: 85 [2021-05-03 13:49:54,025 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 13:49:54,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 13:49:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-05-03 13:49:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 65 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 151 transitions. [2021-05-03 13:49:54,029 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 151 transitions. Word has length 14 [2021-05-03 13:49:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:54,030 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 151 transitions. [2021-05-03 13:49:54,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 151 transitions. [2021-05-03 13:49:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:54,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:54,031 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:54,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 13:49:54,241 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:54,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1808964005, now seen corresponding path program 15 times [2021-05-03 13:49:54,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:54,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210098036] [2021-05-03 13:49:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:54,244 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:54,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53559451] [2021-05-03 13:49:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:49:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:54,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:54,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:54,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:54,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2021-05-03 13:49:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210098036] [2021-05-03 13:49:54,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:54,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53559451] [2021-05-03 13:49:54,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:54,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:49:54,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538075852] [2021-05-03 13:49:54,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:54,441 INFO L87 Difference]: Start difference. First operand 66 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:54,586 INFO L93 Difference]: Finished difference Result 98 states and 217 transitions. [2021-05-03 13:49:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:49:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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 14 [2021-05-03 13:49:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:54,587 INFO L225 Difference]: With dead ends: 98 [2021-05-03 13:49:54,587 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 13:49:54,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 13:49:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-05-03 13:49:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-05-03 13:49:54,590 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-05-03 13:49:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:54,590 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-05-03 13:49:54,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-05-03 13:49:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:54,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:54,590 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:54,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 13:49:54,793 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1827398031, now seen corresponding path program 16 times [2021-05-03 13:49:54,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:54,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396611128] [2021-05-03 13:49:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:54,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:54,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6092781] [2021-05-03 13:49:54,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:54,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:54,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:54,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:54,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:54,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:54,870 INFO L446 ElimStorePlain]: Different costs {0=[v_A_27], 1=[F]} [2021-05-03 13:49:54,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:54,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,885 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:54,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-05-03 13:49:54,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:54,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:54,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-05-03 13:49:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396611128] [2021-05-03 13:49:54,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6092781] [2021-05-03 13:49:54,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:54,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:54,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537408642] [2021-05-03 13:49:54,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:54,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:54,940 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,013 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2021-05-03 13:49:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,014 INFO L225 Difference]: With dead ends: 90 [2021-05-03 13:49:55,014 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 13:49:55,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 13:49:55,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-05-03 13:49:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-05-03 13:49:55,016 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 14 [2021-05-03 13:49:55,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,016 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-05-03 13:49:55,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-05-03 13:49:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:55,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:55,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,217 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1151411961, now seen corresponding path program 17 times [2021-05-03 13:49:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389653947] [2021-05-03 13:49:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:55,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:55,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131741467] [2021-05-03 13:49:55,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:55,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:55,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:55,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:55,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:49:55,307 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:55,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:55,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:55,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-05-03 13:49:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389653947] [2021-05-03 13:49:55,370 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:55,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131741467] [2021-05-03 13:49:55,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:55,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:55,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523946873] [2021-05-03 13:49:55,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:55,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:55,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:55,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:55,371 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,441 INFO L93 Difference]: Finished difference Result 92 states and 208 transitions. [2021-05-03 13:49:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,442 INFO L225 Difference]: With dead ends: 92 [2021-05-03 13:49:55,442 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 13:49:55,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 13:49:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-05-03 13:49:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.306451612903226) internal successors, (143), 62 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 143 transitions. [2021-05-03 13:49:55,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 143 transitions. Word has length 14 [2021-05-03 13:49:55,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,444 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 143 transitions. [2021-05-03 13:49:55,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 143 transitions. [2021-05-03 13:49:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:55,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,445 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:55,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,665 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2097562877, now seen corresponding path program 18 times [2021-05-03 13:49:55,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:55,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602460429] [2021-05-03 13:49:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:55,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:55,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445391122] [2021-05-03 13:49:55,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:55,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:49:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:55,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:55,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:55,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 13:49:55,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-05-03 13:49:55,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:55,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:55,788 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602460429] [2021-05-03 13:49:55,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445391122] [2021-05-03 13:49:55,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:55,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:55,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570459881] [2021-05-03 13:49:55,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:55,810 INFO L87 Difference]: Start difference. First operand 63 states and 143 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,910 INFO L93 Difference]: Finished difference Result 87 states and 196 transitions. [2021-05-03 13:49:55,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,911 INFO L225 Difference]: With dead ends: 87 [2021-05-03 13:49:55,911 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 13:49:55,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 13:49:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-05-03 13:49:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3230769230769233) internal successors, (151), 65 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 151 transitions. [2021-05-03 13:49:55,913 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 151 transitions. Word has length 14 [2021-05-03 13:49:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,913 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 151 transitions. [2021-05-03 13:49:55,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 151 transitions. [2021-05-03 13:49:55,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:55,913 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,913 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:56,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 13:49:56,117 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -379219171, now seen corresponding path program 19 times [2021-05-03 13:49:56,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:56,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970765835] [2021-05-03 13:49:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:56,120 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:56,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374974206] [2021-05-03 13:49:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:56,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:56,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:56,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:56,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:49:56,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,233 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:16 [2021-05-03 13:49:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970765835] [2021-05-03 13:49:56,267 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:56,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374974206] [2021-05-03 13:49:56,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:56,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:56,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019712980] [2021-05-03 13:49:56,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:56,268 INFO L87 Difference]: Start difference. First operand 66 states and 151 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:56,381 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2021-05-03 13:49:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:56,382 INFO L225 Difference]: With dead ends: 97 [2021-05-03 13:49:56,382 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 13:49:56,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 13:49:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-05-03 13:49:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-05-03 13:49:56,385 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-05-03 13:49:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:56,385 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-05-03 13:49:56,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-05-03 13:49:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:56,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:56,385 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:56,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,597 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -360785145, now seen corresponding path program 20 times [2021-05-03 13:49:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:56,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937282026] [2021-05-03 13:49:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:56,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:56,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971371534] [2021-05-03 13:49:56,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:56,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:56,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:49:56,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:49:56,687 INFO L446 ElimStorePlain]: Different costs {0=[v_A_31], 1=[F]} [2021-05-03 13:49:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:56,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,703 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:56,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2021-05-03 13:49:56,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:56,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:56,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:16 [2021-05-03 13:49:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937282026] [2021-05-03 13:49:56,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:56,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971371534] [2021-05-03 13:49:56,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:56,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768995938] [2021-05-03 13:49:56,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:56,759 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:56,875 INFO L93 Difference]: Finished difference Result 92 states and 211 transitions. [2021-05-03 13:49:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:56,876 INFO L225 Difference]: With dead ends: 92 [2021-05-03 13:49:56,876 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 13:49:56,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 13:49:56,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2021-05-03 13:49:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 145 transitions. [2021-05-03 13:49:56,879 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 145 transitions. Word has length 14 [2021-05-03 13:49:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:56,879 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 145 transitions. [2021-05-03 13:49:56,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 145 transitions. [2021-05-03 13:49:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:56,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:56,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:57,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 13:49:57,080 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 955372159, now seen corresponding path program 21 times [2021-05-03 13:49:57,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:57,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435708706] [2021-05-03 13:49:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:57,084 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:57,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789459351] [2021-05-03 13:49:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:49:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:57,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:49:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:57,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:57,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-05-03 13:49:57,155 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:57,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:57,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:35, output treesize:22 [2021-05-03 13:49:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435708706] [2021-05-03 13:49:57,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:57,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789459351] [2021-05-03 13:49:57,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:57,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:49:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431245493] [2021-05-03 13:49:57,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:49:57,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:49:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:57,252 INFO L87 Difference]: Start difference. First operand 64 states and 145 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:57,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:57,405 INFO L93 Difference]: Finished difference Result 97 states and 216 transitions. [2021-05-03 13:49:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:49:57,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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 14 [2021-05-03 13:49:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:57,405 INFO L225 Difference]: With dead ends: 97 [2021-05-03 13:49:57,405 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 13:49:57,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:49:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 13:49:57,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-05-03 13:49:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-05-03 13:49:57,407 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-05-03 13:49:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:57,407 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-05-03 13:49:57,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-05-03 13:49:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-05-03 13:49:57,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 13:49:57,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:57,408 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:57,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,613 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:57,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:57,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2028457539, now seen corresponding path program 22 times [2021-05-03 13:49:57,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:57,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422134013] [2021-05-03 13:49:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:57,616 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:57,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212518362] [2021-05-03 13:49:57,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:57,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:49:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:57,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:49:57,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:49:57,691 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-05-03 13:49:57,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2021-05-03 13:49:57,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:49:57,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:49:57,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:49:57,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:16 [2021-05-03 13:49:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:57,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422134013] [2021-05-03 13:49:57,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:57,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212518362] [2021-05-03 13:49:57,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:57,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:57,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766451194] [2021-05-03 13:49:57,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:57,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:57,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:57,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:57,747 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:57,831 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2021-05-03 13:49:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 14 [2021-05-03 13:49:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:57,832 INFO L225 Difference]: With dead ends: 105 [2021-05-03 13:49:57,832 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 13:49:57,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 13:49:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2021-05-03 13:49:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.3125) internal successors, (148), 64 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 148 transitions. [2021-05-03 13:49:57,835 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 148 transitions. Word has length 14 [2021-05-03 13:49:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:57,835 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 148 transitions. [2021-05-03 13:49:57,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2021-05-03 13:49:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 148 transitions. [2021-05-03 13:49:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:57,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:57,835 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 13:49:58,045 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1040637117, now seen corresponding path program 23 times [2021-05-03 13:49:58,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898893765] [2021-05-03 13:49:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624328648] [2021-05-03 13:49:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:58,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:58,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:58,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898893765] [2021-05-03 13:49:58,165 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:58,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624328648] [2021-05-03 13:49:58,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:58,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:49:58,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250961534] [2021-05-03 13:49:58,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:49:58,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:58,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:49:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:58,169 INFO L87 Difference]: Start difference. First operand 65 states and 148 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:58,247 INFO L93 Difference]: Finished difference Result 131 states and 281 transitions. [2021-05-03 13:49:58,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:58,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:58,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:58,248 INFO L225 Difference]: With dead ends: 131 [2021-05-03 13:49:58,248 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 13:49:58,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:49:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 13:49:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2021-05-03 13:49:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.326923076923077) internal successors, (242), 104 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 242 transitions. [2021-05-03 13:49:58,252 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 242 transitions. Word has length 15 [2021-05-03 13:49:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:58,252 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 242 transitions. [2021-05-03 13:49:58,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 242 transitions. [2021-05-03 13:49:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:58,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:58,253 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 13:49:58,474 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2064358339, now seen corresponding path program 24 times [2021-05-03 13:49:58,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531316127] [2021-05-03 13:49:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:58,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932201588] [2021-05-03 13:49:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:49:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:49:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:58,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531316127] [2021-05-03 13:49:58,595 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932201588] [2021-05-03 13:49:58,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-03 13:49:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359613167] [2021-05-03 13:49:58,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:49:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:49:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:58,597 INFO L87 Difference]: Start difference. First operand 105 states and 242 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:58,797 INFO L93 Difference]: Finished difference Result 172 states and 363 transitions. [2021-05-03 13:49:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:49:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:58,798 INFO L225 Difference]: With dead ends: 172 [2021-05-03 13:49:58,798 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 13:49:58,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 13:49:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 125. [2021-05-03 13:49:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.346774193548387) internal successors, (291), 124 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 291 transitions. [2021-05-03 13:49:58,802 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 291 transitions. Word has length 15 [2021-05-03 13:49:58,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:58,802 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 291 transitions. [2021-05-03 13:49:58,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,802 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 291 transitions. [2021-05-03 13:49:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:58,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:58,803 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:59,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 13:49:59,017 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1261506553, now seen corresponding path program 25 times [2021-05-03 13:49:59,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:59,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888382864] [2021-05-03 13:49:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:59,023 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:59,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290925027] [2021-05-03 13:49:59,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888382864] [2021-05-03 13:49:59,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:59,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290925027] [2021-05-03 13:49:59,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:59,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:49:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634480093] [2021-05-03 13:49:59,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:49:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:49:59,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:59,145 INFO L87 Difference]: Start difference. First operand 125 states and 291 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:59,344 INFO L93 Difference]: Finished difference Result 176 states and 393 transitions. [2021-05-03 13:49:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:49:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:59,345 INFO L225 Difference]: With dead ends: 176 [2021-05-03 13:49:59,345 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 13:49:59,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 13:49:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-05-03 13:49:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.4057971014492754) internal successors, (332), 138 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2021-05-03 13:49:59,350 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 15 [2021-05-03 13:49:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:59,350 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2021-05-03 13:49:59,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2021-05-03 13:49:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:59,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:59,351 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:59,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 13:49:59,565 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:59,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1279940579, now seen corresponding path program 26 times [2021-05-03 13:49:59,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:59,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844626511] [2021-05-03 13:49:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:59,571 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:49:59,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362337658] [2021-05-03 13:49:59,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:59,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844626511] [2021-05-03 13:49:59,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:49:59,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362337658] [2021-05-03 13:49:59,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:49:59,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:49:59,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514738169] [2021-05-03 13:49:59,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:49:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:49:59,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:59,677 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:59,771 INFO L93 Difference]: Finished difference Result 205 states and 453 transitions. [2021-05-03 13:49:59,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:59,773 INFO L225 Difference]: With dead ends: 205 [2021-05-03 13:49:59,773 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 13:49:59,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 13:49:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-05-03 13:49:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.4214285714285713) internal successors, (339), 140 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 339 transitions. [2021-05-03 13:49:59,778 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 339 transitions. Word has length 15 [2021-05-03 13:49:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:59,778 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 339 transitions. [2021-05-03 13:49:59,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,779 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 339 transitions. [2021-05-03 13:49:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:59,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:59,779 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 13:50:00,001 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1851395385, now seen corresponding path program 27 times [2021-05-03 13:50:00,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109328821] [2021-05-03 13:50:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,005 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:00,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132818246] [2021-05-03 13:50:00,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 13:50:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109328821] [2021-05-03 13:50:00,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:00,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132818246] [2021-05-03 13:50:00,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:00,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:00,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878471774] [2021-05-03 13:50:00,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:00,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:00,127 INFO L87 Difference]: Start difference. First operand 141 states and 339 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:00,234 INFO L93 Difference]: Finished difference Result 202 states and 430 transitions. [2021-05-03 13:50:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:00,235 INFO L225 Difference]: With dead ends: 202 [2021-05-03 13:50:00,236 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 13:50:00,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 13:50:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 131. [2021-05-03 13:50:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4461538461538463) internal successors, (318), 130 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 318 transitions. [2021-05-03 13:50:00,240 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 318 transitions. Word has length 15 [2021-05-03 13:50:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:00,240 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 318 transitions. [2021-05-03 13:50:00,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 318 transitions. [2021-05-03 13:50:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:00,241 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:00,241 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,453 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 51628827, now seen corresponding path program 28 times [2021-05-03 13:50:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625042040] [2021-05-03 13:50:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:00,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758799643] [2021-05-03 13:50:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:00,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625042040] [2021-05-03 13:50:00,585 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:00,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758799643] [2021-05-03 13:50:00,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:00,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:00,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706683184] [2021-05-03 13:50:00,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:00,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:00,588 INFO L87 Difference]: Start difference. First operand 131 states and 318 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:00,692 INFO L93 Difference]: Finished difference Result 140 states and 332 transitions. [2021-05-03 13:50:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:00,693 INFO L225 Difference]: With dead ends: 140 [2021-05-03 13:50:00,693 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 13:50:00,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:00,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 13:50:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-05-03 13:50:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.450381679389313) internal successors, (321), 131 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 321 transitions. [2021-05-03 13:50:00,696 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 321 transitions. Word has length 15 [2021-05-03 13:50:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:00,697 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 321 transitions. [2021-05-03 13:50:00,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 321 transitions. [2021-05-03 13:50:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:00,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:00,697 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,919 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1769972533, now seen corresponding path program 29 times [2021-05-03 13:50:00,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320767039] [2021-05-03 13:50:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,922 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:00,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253356564] [2021-05-03 13:50:00,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:00,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320767039] [2021-05-03 13:50:01,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:01,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253356564] [2021-05-03 13:50:01,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:01,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:01,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213928133] [2021-05-03 13:50:01,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:01,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:01,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:01,059 INFO L87 Difference]: Start difference. First operand 132 states and 321 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:01,188 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2021-05-03 13:50:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:01,189 INFO L225 Difference]: With dead ends: 168 [2021-05-03 13:50:01,189 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 13:50:01,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 13:50:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-05-03 13:50:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.462121212121212) internal successors, (325), 132 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 325 transitions. [2021-05-03 13:50:01,194 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 325 transitions. Word has length 15 [2021-05-03 13:50:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:01,194 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 325 transitions. [2021-05-03 13:50:01,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 325 transitions. [2021-05-03 13:50:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:01,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:01,195 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:01,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-03 13:50:01,409 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:01,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1659150013, now seen corresponding path program 30 times [2021-05-03 13:50:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:01,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856674188] [2021-05-03 13:50:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:01,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:01,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612748977] [2021-05-03 13:50:01,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:01,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:01,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856674188] [2021-05-03 13:50:01,525 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:01,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612748977] [2021-05-03 13:50:01,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:01,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670794822] [2021-05-03 13:50:01,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:01,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:01,526 INFO L87 Difference]: Start difference. First operand 133 states and 325 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:01,634 INFO L93 Difference]: Finished difference Result 162 states and 388 transitions. [2021-05-03 13:50:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:01,635 INFO L225 Difference]: With dead ends: 162 [2021-05-03 13:50:01,635 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 13:50:01,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 13:50:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 131. [2021-05-03 13:50:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4461538461538463) internal successors, (318), 130 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 318 transitions. [2021-05-03 13:50:01,639 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 318 transitions. Word has length 15 [2021-05-03 13:50:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:01,639 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 318 transitions. [2021-05-03 13:50:01,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 318 transitions. [2021-05-03 13:50:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:01,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:01,640 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:01,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,861 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1788406559, now seen corresponding path program 31 times [2021-05-03 13:50:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:01,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171865712] [2021-05-03 13:50:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:01,863 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:01,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119901385] [2021-05-03 13:50:01,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171865712] [2021-05-03 13:50:01,981 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:01,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119901385] [2021-05-03 13:50:01,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:01,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:01,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146317909] [2021-05-03 13:50:01,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:01,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:01,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:01,982 INFO L87 Difference]: Start difference. First operand 131 states and 318 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:02,134 INFO L93 Difference]: Finished difference Result 171 states and 401 transitions. [2021-05-03 13:50:02,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:02,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:02,135 INFO L225 Difference]: With dead ends: 171 [2021-05-03 13:50:02,135 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 13:50:02,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 13:50:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2021-05-03 13:50:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.4696969696969697) internal successors, (326), 132 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 326 transitions. [2021-05-03 13:50:02,140 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 326 transitions. Word has length 15 [2021-05-03 13:50:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:02,140 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 326 transitions. [2021-05-03 13:50:02,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 326 transitions. [2021-05-03 13:50:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:02,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:02,140 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:02,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 13:50:02,362 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:02,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:02,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1677584039, now seen corresponding path program 32 times [2021-05-03 13:50:02,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457439456] [2021-05-03 13:50:02,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:02,364 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:02,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407877560] [2021-05-03 13:50:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:02,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:02,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457439456] [2021-05-03 13:50:02,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:02,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407877560] [2021-05-03 13:50:02,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:02,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869332053] [2021-05-03 13:50:02,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:02,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:02,507 INFO L87 Difference]: Start difference. First operand 133 states and 326 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:02,652 INFO L93 Difference]: Finished difference Result 165 states and 395 transitions. [2021-05-03 13:50:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:02,653 INFO L225 Difference]: With dead ends: 165 [2021-05-03 13:50:02,653 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 13:50:02,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 13:50:02,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 132. [2021-05-03 13:50:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4580152671755724) internal successors, (322), 131 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 322 transitions. [2021-05-03 13:50:02,657 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 322 transitions. Word has length 15 [2021-05-03 13:50:02,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:02,657 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 322 transitions. [2021-05-03 13:50:02,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 322 transitions. [2021-05-03 13:50:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:02,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:02,658 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:02,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:02,858 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:02,859 INFO L82 PathProgramCache]: Analyzing trace with hash 685977243, now seen corresponding path program 33 times [2021-05-03 13:50:02,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:02,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028872423] [2021-05-03 13:50:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:02,861 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:02,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227856758] [2021-05-03 13:50:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:02,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:02,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:02,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:02,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:02,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:02,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:02,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:02,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:02,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:02,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:02,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-05-03 13:50:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 13:50:02,982 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:02,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:02,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:02,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:02,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:03,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:03,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-05-03 13:50:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028872423] [2021-05-03 13:50:03,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227856758] [2021-05-03 13:50:03,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:03,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:03,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294812275] [2021-05-03 13:50:03,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:03,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:03,034 INFO L87 Difference]: Start difference. First operand 132 states and 322 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:03,131 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2021-05-03 13:50:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:03,133 INFO L225 Difference]: With dead ends: 142 [2021-05-03 13:50:03,133 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 13:50:03,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 13:50:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2021-05-03 13:50:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.4511278195488724) internal successors, (326), 133 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 326 transitions. [2021-05-03 13:50:03,136 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 326 transitions. Word has length 15 [2021-05-03 13:50:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:03,136 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 326 transitions. [2021-05-03 13:50:03,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 326 transitions. [2021-05-03 13:50:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:03,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:03,137 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:03,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 13:50:03,353 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1879942719, now seen corresponding path program 34 times [2021-05-03 13:50:03,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:03,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456638743] [2021-05-03 13:50:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:03,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:03,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062421927] [2021-05-03 13:50:03,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:03,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456638743] [2021-05-03 13:50:03,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062421927] [2021-05-03 13:50:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:03,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:03,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133495914] [2021-05-03 13:50:03,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:03,480 INFO L87 Difference]: Start difference. First operand 134 states and 326 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:03,631 INFO L93 Difference]: Finished difference Result 251 states and 572 transitions. [2021-05-03 13:50:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:03,633 INFO L225 Difference]: With dead ends: 251 [2021-05-03 13:50:03,633 INFO L226 Difference]: Without dead ends: 246 [2021-05-03 13:50:03,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-03 13:50:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2021-05-03 13:50:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.5310344827586206) internal successors, (367), 145 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 367 transitions. [2021-05-03 13:50:03,638 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 367 transitions. Word has length 15 [2021-05-03 13:50:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:03,638 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 367 transitions. [2021-05-03 13:50:03,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 367 transitions. [2021-05-03 13:50:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:03,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:03,638 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:03,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 13:50:03,853 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash -161599013, now seen corresponding path program 35 times [2021-05-03 13:50:03,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:03,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569343654] [2021-05-03 13:50:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:03,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:03,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460985237] [2021-05-03 13:50:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:03,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:03,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:03,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569343654] [2021-05-03 13:50:03,993 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:03,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460985237] [2021-05-03 13:50:03,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:03,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:03,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159798864] [2021-05-03 13:50:03,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:03,995 INFO L87 Difference]: Start difference. First operand 146 states and 367 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:04,116 INFO L93 Difference]: Finished difference Result 263 states and 600 transitions. [2021-05-03 13:50:04,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:04,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:04,117 INFO L225 Difference]: With dead ends: 263 [2021-05-03 13:50:04,117 INFO L226 Difference]: Without dead ends: 259 [2021-05-03 13:50:04,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-03 13:50:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 145. [2021-05-03 13:50:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.5277777777777777) internal successors, (364), 144 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 364 transitions. [2021-05-03 13:50:04,122 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 364 transitions. Word has length 15 [2021-05-03 13:50:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:04,122 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 364 transitions. [2021-05-03 13:50:04,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 364 transitions. [2021-05-03 13:50:04,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:04,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:04,123 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:04,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 13:50:04,337 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:04,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1190403433, now seen corresponding path program 36 times [2021-05-03 13:50:04,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:04,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16619332] [2021-05-03 13:50:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:04,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:04,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453099231] [2021-05-03 13:50:04,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:04,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:04,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:04,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:50:04,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16619332] [2021-05-03 13:50:04,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:04,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453099231] [2021-05-03 13:50:04,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:04,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463416454] [2021-05-03 13:50:04,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:04,437 INFO L87 Difference]: Start difference. First operand 145 states and 364 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:04,527 INFO L93 Difference]: Finished difference Result 229 states and 547 transitions. [2021-05-03 13:50:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:04,528 INFO L225 Difference]: With dead ends: 229 [2021-05-03 13:50:04,528 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 13:50:04,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 13:50:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2021-05-03 13:50:04,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.567741935483871) internal successors, (398), 155 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 398 transitions. [2021-05-03 13:50:04,532 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 398 transitions. Word has length 15 [2021-05-03 13:50:04,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:04,533 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 398 transitions. [2021-05-03 13:50:04,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 398 transitions. [2021-05-03 13:50:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:04,533 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:04,533 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:04,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 13:50:04,749 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1308487913, now seen corresponding path program 37 times [2021-05-03 13:50:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:04,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328416156] [2021-05-03 13:50:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:04,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:04,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374562268] [2021-05-03 13:50:04,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:04,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328416156] [2021-05-03 13:50:04,882 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:04,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374562268] [2021-05-03 13:50:04,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:04,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:04,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991717161] [2021-05-03 13:50:04,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:04,884 INFO L87 Difference]: Start difference. First operand 156 states and 398 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,005 INFO L93 Difference]: Finished difference Result 226 states and 546 transitions. [2021-05-03 13:50:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,006 INFO L225 Difference]: With dead ends: 226 [2021-05-03 13:50:05,006 INFO L226 Difference]: Without dead ends: 221 [2021-05-03 13:50:05,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-03 13:50:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 159. [2021-05-03 13:50:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.5822784810126582) internal successors, (408), 158 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 408 transitions. [2021-05-03 13:50:05,012 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 408 transitions. Word has length 15 [2021-05-03 13:50:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,013 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 408 transitions. [2021-05-03 13:50:05,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 408 transitions. [2021-05-03 13:50:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:05,014 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,014 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:05,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 13:50:05,233 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 409855793, now seen corresponding path program 38 times [2021-05-03 13:50:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:05,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440788211] [2021-05-03 13:50:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:05,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:05,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597975183] [2021-05-03 13:50:05,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440788211] [2021-05-03 13:50:05,350 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:05,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597975183] [2021-05-03 13:50:05,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:05,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:05,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451638932] [2021-05-03 13:50:05,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:05,351 INFO L87 Difference]: Start difference. First operand 159 states and 408 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,484 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2021-05-03 13:50:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,485 INFO L225 Difference]: With dead ends: 247 [2021-05-03 13:50:05,486 INFO L226 Difference]: Without dead ends: 243 [2021-05-03 13:50:05,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-03 13:50:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 159. [2021-05-03 13:50:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-05-03 13:50:05,490 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-05-03 13:50:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-05-03 13:50:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-05-03 13:50:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:05,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,491 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:05,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,705 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:05,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:05,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2141071811, now seen corresponding path program 39 times [2021-05-03 13:50:05,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:05,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106485892] [2021-05-03 13:50:05,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:05,710 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:05,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554523153] [2021-05-03 13:50:05,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:05,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:05,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106485892] [2021-05-03 13:50:05,828 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:05,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554523153] [2021-05-03 13:50:05,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:05,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184313474] [2021-05-03 13:50:05,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:05,829 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,940 INFO L93 Difference]: Finished difference Result 181 states and 450 transitions. [2021-05-03 13:50:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,941 INFO L225 Difference]: With dead ends: 181 [2021-05-03 13:50:05,941 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 13:50:05,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 13:50:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2021-05-03 13:50:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-05-03 13:50:05,945 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-05-03 13:50:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,945 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-05-03 13:50:05,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-05-03 13:50:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:05,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,946 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,165 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash 428289819, now seen corresponding path program 40 times [2021-05-03 13:50:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651004588] [2021-05-03 13:50:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,167 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:06,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954918398] [2021-05-03 13:50:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:06,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651004588] [2021-05-03 13:50:06,291 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:06,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954918398] [2021-05-03 13:50:06,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:06,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163637798] [2021-05-03 13:50:06,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:06,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:06,292 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:06,411 INFO L93 Difference]: Finished difference Result 212 states and 527 transitions. [2021-05-03 13:50:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:06,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:06,412 INFO L225 Difference]: With dead ends: 212 [2021-05-03 13:50:06,412 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 13:50:06,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 13:50:06,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2021-05-03 13:50:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.588607594936709) internal successors, (409), 158 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 409 transitions. [2021-05-03 13:50:06,417 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 409 transitions. Word has length 15 [2021-05-03 13:50:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:06,417 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 409 transitions. [2021-05-03 13:50:06,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 409 transitions. [2021-05-03 13:50:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:06,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:06,418 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,633 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 955767327, now seen corresponding path program 41 times [2021-05-03 13:50:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531617067] [2021-05-03 13:50:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,636 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:06,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927841374] [2021-05-03 13:50:06,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:06,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531617067] [2021-05-03 13:50:06,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:06,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927841374] [2021-05-03 13:50:06,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:06,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:06,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172861870] [2021-05-03 13:50:06,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:06,719 INFO L87 Difference]: Start difference. First operand 159 states and 409 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:06,808 INFO L93 Difference]: Finished difference Result 267 states and 630 transitions. [2021-05-03 13:50:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:06,810 INFO L225 Difference]: With dead ends: 267 [2021-05-03 13:50:06,810 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 13:50:06,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 13:50:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 166. [2021-05-03 13:50:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-05-03 13:50:06,814 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-05-03 13:50:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:06,814 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-05-03 13:50:06,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-05-03 13:50:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:06,815 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:06,815 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 13:50:07,036 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash 837682847, now seen corresponding path program 42 times [2021-05-03 13:50:07,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508106177] [2021-05-03 13:50:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,039 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:07,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269281669] [2021-05-03 13:50:07,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:07,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:07,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:07,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:07,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:07,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:07,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:07,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:07,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 13:50:07,173 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:07,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:07,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:07,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:07,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:07,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-05-03 13:50:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:07,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508106177] [2021-05-03 13:50:07,216 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:07,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269281669] [2021-05-03 13:50:07,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:07,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:07,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576730045] [2021-05-03 13:50:07,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:07,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:07,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:07,217 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,338 INFO L93 Difference]: Finished difference Result 187 states and 469 transitions. [2021-05-03 13:50:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:07,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,339 INFO L225 Difference]: With dead ends: 187 [2021-05-03 13:50:07,339 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 13:50:07,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:07,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 13:50:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2021-05-03 13:50:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-05-03 13:50:07,343 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-05-03 13:50:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,343 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-05-03 13:50:07,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-05-03 13:50:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:07,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,343 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 13:50:07,561 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash 5098949, now seen corresponding path program 43 times [2021-05-03 13:50:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726184276] [2021-05-03 13:50:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,563 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:07,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280874505] [2021-05-03 13:50:07,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:07,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726184276] [2021-05-03 13:50:07,691 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:07,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280874505] [2021-05-03 13:50:07,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:07,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978354807] [2021-05-03 13:50:07,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:07,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:07,692 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,829 INFO L93 Difference]: Finished difference Result 192 states and 481 transitions. [2021-05-03 13:50:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,830 INFO L225 Difference]: With dead ends: 192 [2021-05-03 13:50:07,830 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 13:50:07,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 13:50:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2021-05-03 13:50:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.618181818181818) internal successors, (432), 165 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 432 transitions. [2021-05-03 13:50:07,833 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 432 transitions. Word has length 15 [2021-05-03 13:50:07,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,833 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 432 transitions. [2021-05-03 13:50:07,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 432 transitions. [2021-05-03 13:50:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:07,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,834 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:08,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 13:50:08,049 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1720506717, now seen corresponding path program 44 times [2021-05-03 13:50:08,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:08,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017952447] [2021-05-03 13:50:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:08,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:08,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523874108] [2021-05-03 13:50:08,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:08,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:08,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017952447] [2021-05-03 13:50:08,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:08,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523874108] [2021-05-03 13:50:08,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:08,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507858010] [2021-05-03 13:50:08,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:08,173 INFO L87 Difference]: Start difference. First operand 166 states and 432 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,285 INFO L93 Difference]: Finished difference Result 225 states and 564 transitions. [2021-05-03 13:50:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,286 INFO L225 Difference]: With dead ends: 225 [2021-05-03 13:50:08,286 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 13:50:08,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 13:50:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2021-05-03 13:50:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.5987654320987654) internal successors, (421), 162 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 421 transitions. [2021-05-03 13:50:08,290 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 421 transitions. Word has length 15 [2021-05-03 13:50:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,290 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 421 transitions. [2021-05-03 13:50:08,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 421 transitions. [2021-05-03 13:50:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:08,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,290 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:08,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,501 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:08,501 INFO L82 PathProgramCache]: Analyzing trace with hash 576553755, now seen corresponding path program 45 times [2021-05-03 13:50:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:08,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541222898] [2021-05-03 13:50:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:08,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:08,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559988763] [2021-05-03 13:50:08,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:08,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:08,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:08,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:08,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:08,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:08,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:08,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:08,625 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-05-03 13:50:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2021-05-03 13:50:08,627 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:08,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:08,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-03 13:50:08,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:08,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:08,647 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:45, output treesize:16 [2021-05-03 13:50:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:08,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541222898] [2021-05-03 13:50:08,705 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:08,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559988763] [2021-05-03 13:50:08,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:08,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:08,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651710194] [2021-05-03 13:50:08,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:08,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:08,706 INFO L87 Difference]: Start difference. First operand 163 states and 421 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,827 INFO L93 Difference]: Finished difference Result 180 states and 449 transitions. [2021-05-03 13:50:08,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,828 INFO L225 Difference]: With dead ends: 180 [2021-05-03 13:50:08,828 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 13:50:08,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 13:50:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 165. [2021-05-03 13:50:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.5853658536585367) internal successors, (424), 164 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 424 transitions. [2021-05-03 13:50:08,832 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 424 transitions. Word has length 15 [2021-05-03 13:50:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 424 transitions. [2021-05-03 13:50:08,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 424 transitions. [2021-05-03 13:50:08,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:08,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,833 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 13:50:09,049 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -256408741, now seen corresponding path program 46 times [2021-05-03 13:50:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713431724] [2021-05-03 13:50:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,051 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:09,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58466159] [2021-05-03 13:50:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:09,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713431724] [2021-05-03 13:50:09,178 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:09,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58466159] [2021-05-03 13:50:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120584177] [2021-05-03 13:50:09,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:09,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:09,179 INFO L87 Difference]: Start difference. First operand 165 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:09,292 INFO L93 Difference]: Finished difference Result 242 states and 582 transitions. [2021-05-03 13:50:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:09,293 INFO L225 Difference]: With dead ends: 242 [2021-05-03 13:50:09,293 INFO L226 Difference]: Without dead ends: 237 [2021-05-03 13:50:09,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-03 13:50:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2021-05-03 13:50:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.5527950310559007) internal successors, (411), 161 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2021-05-03 13:50:09,297 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 15 [2021-05-03 13:50:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:09,297 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2021-05-03 13:50:09,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2021-05-03 13:50:09,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:09,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:09,298 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 13:50:09,509 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1461934965, now seen corresponding path program 47 times [2021-05-03 13:50:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838835507] [2021-05-03 13:50:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,517 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:09,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402689032] [2021-05-03 13:50:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:09,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:09,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838835507] [2021-05-03 13:50:09,626 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:09,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402689032] [2021-05-03 13:50:09,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:09,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471249843] [2021-05-03 13:50:09,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:09,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:09,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:09,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:09,627 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:09,767 INFO L93 Difference]: Finished difference Result 241 states and 583 transitions. [2021-05-03 13:50:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:09,768 INFO L225 Difference]: With dead ends: 241 [2021-05-03 13:50:09,768 INFO L226 Difference]: Without dead ends: 237 [2021-05-03 13:50:09,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-03 13:50:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 152. [2021-05-03 13:50:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.5165562913907285) internal successors, (380), 151 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 380 transitions. [2021-05-03 13:50:09,771 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 380 transitions. Word has length 15 [2021-05-03 13:50:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:09,772 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 380 transitions. [2021-05-03 13:50:09,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 380 transitions. [2021-05-03 13:50:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:09,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:09,772 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 13:50:09,989 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1139091843, now seen corresponding path program 48 times [2021-05-03 13:50:09,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150877799] [2021-05-03 13:50:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:09,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358030716] [2021-05-03 13:50:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:10,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150877799] [2021-05-03 13:50:10,068 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358030716] [2021-05-03 13:50:10,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:10,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:10,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376004384] [2021-05-03 13:50:10,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:10,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:10,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:10,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:10,069 INFO L87 Difference]: Start difference. First operand 152 states and 380 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:10,219 INFO L93 Difference]: Finished difference Result 252 states and 620 transitions. [2021-05-03 13:50:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:10,221 INFO L225 Difference]: With dead ends: 252 [2021-05-03 13:50:10,221 INFO L226 Difference]: Without dead ends: 235 [2021-05-03 13:50:10,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-03 13:50:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2021-05-03 13:50:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.509433962264151) internal successors, (399), 159 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 399 transitions. [2021-05-03 13:50:10,225 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 399 transitions. Word has length 15 [2021-05-03 13:50:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:10,225 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 399 transitions. [2021-05-03 13:50:10,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 399 transitions. [2021-05-03 13:50:10,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:10,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:10,226 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:10,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 13:50:10,441 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 206681367, now seen corresponding path program 49 times [2021-05-03 13:50:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897142369] [2021-05-03 13:50:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:10,443 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:10,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450706959] [2021-05-03 13:50:10,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897142369] [2021-05-03 13:50:10,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450706959] [2021-05-03 13:50:10,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:10,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598038935] [2021-05-03 13:50:10,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:10,572 INFO L87 Difference]: Start difference. First operand 160 states and 399 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:10,707 INFO L93 Difference]: Finished difference Result 276 states and 675 transitions. [2021-05-03 13:50:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:10,708 INFO L225 Difference]: With dead ends: 276 [2021-05-03 13:50:10,708 INFO L226 Difference]: Without dead ends: 270 [2021-05-03 13:50:10,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-03 13:50:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 160. [2021-05-03 13:50:10,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.50314465408805) internal successors, (398), 159 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 398 transitions. [2021-05-03 13:50:10,712 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 398 transitions. Word has length 15 [2021-05-03 13:50:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:10,712 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 398 transitions. [2021-05-03 13:50:10,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 398 transitions. [2021-05-03 13:50:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:10,713 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:10,713 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:10,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,917 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1180648133, now seen corresponding path program 50 times [2021-05-03 13:50:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:10,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779768149] [2021-05-03 13:50:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:10,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:10,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428324253] [2021-05-03 13:50:10,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:10,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779768149] [2021-05-03 13:50:11,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:11,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428324253] [2021-05-03 13:50:11,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:11,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:11,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631588135] [2021-05-03 13:50:11,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:11,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:11,002 INFO L87 Difference]: Start difference. First operand 160 states and 398 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:11,120 INFO L93 Difference]: Finished difference Result 217 states and 536 transitions. [2021-05-03 13:50:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:11,121 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:50:11,121 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 13:50:11,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 13:50:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-05-03 13:50:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.50625) internal successors, (401), 160 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 401 transitions. [2021-05-03 13:50:11,124 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 401 transitions. Word has length 15 [2021-05-03 13:50:11,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:11,125 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 401 transitions. [2021-05-03 13:50:11,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 401 transitions. [2021-05-03 13:50:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:11,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:11,125 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:11,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 13:50:11,341 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1814996549, now seen corresponding path program 51 times [2021-05-03 13:50:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905522293] [2021-05-03 13:50:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:11,343 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:11,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222922935] [2021-05-03 13:50:11,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:11,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905522293] [2021-05-03 13:50:11,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:11,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222922935] [2021-05-03 13:50:11,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:11,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:11,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465780685] [2021-05-03 13:50:11,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:11,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:11,442 INFO L87 Difference]: Start difference. First operand 161 states and 401 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:11,577 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2021-05-03 13:50:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:11,578 INFO L225 Difference]: With dead ends: 254 [2021-05-03 13:50:11,578 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 13:50:11,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 13:50:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 169. [2021-05-03 13:50:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.5238095238095237) internal successors, (424), 168 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2021-05-03 13:50:11,581 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 15 [2021-05-03 13:50:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:11,581 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2021-05-03 13:50:11,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2021-05-03 13:50:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:11,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:11,582 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:11,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 13:50:11,797 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -750923413, now seen corresponding path program 52 times [2021-05-03 13:50:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:11,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410996870] [2021-05-03 13:50:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:11,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:11,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169685104] [2021-05-03 13:50:11,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:11,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:11,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410996870] [2021-05-03 13:50:11,903 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169685104] [2021-05-03 13:50:11,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:11,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:11,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761833718] [2021-05-03 13:50:11,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:11,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:11,903 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:11,998 INFO L93 Difference]: Finished difference Result 273 states and 657 transitions. [2021-05-03 13:50:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:12,000 INFO L225 Difference]: With dead ends: 273 [2021-05-03 13:50:12,000 INFO L226 Difference]: Without dead ends: 268 [2021-05-03 13:50:12,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-03 13:50:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 174. [2021-05-03 13:50:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.5491329479768785) internal successors, (441), 173 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 441 transitions. [2021-05-03 13:50:12,003 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 441 transitions. Word has length 15 [2021-05-03 13:50:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:12,003 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 441 transitions. [2021-05-03 13:50:12,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 441 transitions. [2021-05-03 13:50:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:12,004 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:12,004 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:12,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:12,225 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 967420293, now seen corresponding path program 53 times [2021-05-03 13:50:12,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:12,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027123330] [2021-05-03 13:50:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:12,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:12,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838954528] [2021-05-03 13:50:12,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:12,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:12,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:12,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:12,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:12,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:12,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-05-03 13:50:12,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:12,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 13:50:12,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,360 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-05-03 13:50:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027123330] [2021-05-03 13:50:12,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838954528] [2021-05-03 13:50:12,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:12,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:12,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448381664] [2021-05-03 13:50:12,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:12,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:12,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:12,390 INFO L87 Difference]: Start difference. First operand 174 states and 441 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:12,505 INFO L93 Difference]: Finished difference Result 236 states and 592 transitions. [2021-05-03 13:50:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:12,506 INFO L225 Difference]: With dead ends: 236 [2021-05-03 13:50:12,506 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 13:50:12,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 13:50:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-05-03 13:50:12,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5517241379310347) internal successors, (444), 174 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 444 transitions. [2021-05-03 13:50:12,510 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 444 transitions. Word has length 15 [2021-05-03 13:50:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:12,510 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 444 transitions. [2021-05-03 13:50:12,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 444 transitions. [2021-05-03 13:50:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:12,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:12,511 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:12,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 13:50:12,729 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:12,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash -61384127, now seen corresponding path program 54 times [2021-05-03 13:50:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454588485] [2021-05-03 13:50:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:12,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:12,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596815140] [2021-05-03 13:50:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:12,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:12,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:12,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 13:50:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:12,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:12,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:12,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 13:50:12,830 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:12,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 13:50:12,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:12,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:12,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:12,867 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:29 [2021-05-03 13:50:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454588485] [2021-05-03 13:50:13,059 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:13,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596815140] [2021-05-03 13:50:13,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:13,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:13,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547430482] [2021-05-03 13:50:13,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:13,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:13,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:13,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:13,060 INFO L87 Difference]: Start difference. First operand 175 states and 444 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:13,414 INFO L93 Difference]: Finished difference Result 245 states and 601 transitions. [2021-05-03 13:50:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:13,416 INFO L225 Difference]: With dead ends: 245 [2021-05-03 13:50:13,416 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 13:50:13,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 13:50:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 180. [2021-05-03 13:50:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.5865921787709496) internal successors, (463), 179 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 463 transitions. [2021-05-03 13:50:13,420 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 463 transitions. Word has length 15 [2021-05-03 13:50:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:13,420 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 463 transitions. [2021-05-03 13:50:13,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 463 transitions. [2021-05-03 13:50:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:13,421 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:13,421 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:13,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:13,642 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:13,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1030486531, now seen corresponding path program 55 times [2021-05-03 13:50:13,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:13,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204825702] [2021-05-03 13:50:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:13,645 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:13,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493087235] [2021-05-03 13:50:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:13,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204825702] [2021-05-03 13:50:13,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:13,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493087235] [2021-05-03 13:50:13,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:13,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:13,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860406970] [2021-05-03 13:50:13,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:13,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:13,795 INFO L87 Difference]: Start difference. First operand 180 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:13,973 INFO L93 Difference]: Finished difference Result 216 states and 546 transitions. [2021-05-03 13:50:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:13,974 INFO L225 Difference]: With dead ends: 216 [2021-05-03 13:50:13,974 INFO L226 Difference]: Without dead ends: 213 [2021-05-03 13:50:13,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-03 13:50:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 181. [2021-05-03 13:50:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-05-03 13:50:13,980 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-05-03 13:50:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:13,980 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-05-03 13:50:13,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-05-03 13:50:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:13,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:13,981 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:14,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 13:50:14,185 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -179468607, now seen corresponding path program 56 times [2021-05-03 13:50:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:14,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883576330] [2021-05-03 13:50:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:14,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:14,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421547854] [2021-05-03 13:50:14,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:14,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:14,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 13:50:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:50:14,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:14,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:14,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:14,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2021-05-03 13:50:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:14,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:14,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:14,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:14,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:35 [2021-05-03 13:50:14,361 INFO L446 ElimStorePlain]: Different costs {0=[v_A_43], 2=[F]} [2021-05-03 13:50:14,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:14,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:14,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:14,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:14,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:14,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-05-03 13:50:14,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 13:50:14,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:14,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:14,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:26 [2021-05-03 13:50:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883576330] [2021-05-03 13:50:14,517 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:14,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421547854] [2021-05-03 13:50:14,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:14,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:14,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627146137] [2021-05-03 13:50:14,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:14,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:14,518 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:14,690 INFO L93 Difference]: Finished difference Result 224 states and 562 transitions. [2021-05-03 13:50:14,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:14,691 INFO L225 Difference]: With dead ends: 224 [2021-05-03 13:50:14,691 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 13:50:14,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 13:50:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2021-05-03 13:50:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-05-03 13:50:14,695 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-05-03 13:50:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:14,695 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-05-03 13:50:14,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-05-03 13:50:14,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:14,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:14,696 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:14,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,897 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1538875099, now seen corresponding path program 57 times [2021-05-03 13:50:14,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:14,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425774019] [2021-05-03 13:50:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:14,899 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:14,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320901412] [2021-05-03 13:50:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:14,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:50:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425774019] [2021-05-03 13:50:15,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:15,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320901412] [2021-05-03 13:50:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:15,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095670990] [2021-05-03 13:50:15,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:15,017 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:15,174 INFO L93 Difference]: Finished difference Result 267 states and 649 transitions. [2021-05-03 13:50:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:15,175 INFO L225 Difference]: With dead ends: 267 [2021-05-03 13:50:15,175 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 13:50:15,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 13:50:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2021-05-03 13:50:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-05-03 13:50:15,179 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-05-03 13:50:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:15,180 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-05-03 13:50:15,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-05-03 13:50:15,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:15,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:15,180 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:15,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,397 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1012052505, now seen corresponding path program 58 times [2021-05-03 13:50:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:15,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958503514] [2021-05-03 13:50:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:15,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:15,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060223833] [2021-05-03 13:50:15,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:15,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:15,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958503514] [2021-05-03 13:50:15,535 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:15,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060223833] [2021-05-03 13:50:15,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:15,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:15,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455127654] [2021-05-03 13:50:15,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:15,536 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:15,636 INFO L93 Difference]: Finished difference Result 218 states and 548 transitions. [2021-05-03 13:50:15,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:15,637 INFO L225 Difference]: With dead ends: 218 [2021-05-03 13:50:15,637 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 13:50:15,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 13:50:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 181. [2021-05-03 13:50:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5944444444444446) internal successors, (467), 180 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 467 transitions. [2021-05-03 13:50:15,644 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 467 transitions. Word has length 15 [2021-05-03 13:50:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:15,644 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 467 transitions. [2021-05-03 13:50:15,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 467 transitions. [2021-05-03 13:50:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:15,644 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:15,645 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:15,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,861 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2101626631, now seen corresponding path program 59 times [2021-05-03 13:50:15,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:15,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818044634] [2021-05-03 13:50:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:15,863 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:15,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296192267] [2021-05-03 13:50:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:15,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:15,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:50:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818044634] [2021-05-03 13:50:15,986 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:15,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296192267] [2021-05-03 13:50:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:15,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574138079] [2021-05-03 13:50:15,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:15,987 INFO L87 Difference]: Start difference. First operand 181 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:16,090 INFO L93 Difference]: Finished difference Result 213 states and 538 transitions. [2021-05-03 13:50:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:16,091 INFO L225 Difference]: With dead ends: 213 [2021-05-03 13:50:16,091 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 13:50:16,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:16,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 13:50:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 182. [2021-05-03 13:50:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.596685082872928) internal successors, (470), 181 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 470 transitions. [2021-05-03 13:50:16,094 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 470 transitions. Word has length 15 [2021-05-03 13:50:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:16,094 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 470 transitions. [2021-05-03 13:50:16,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,095 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 470 transitions. [2021-05-03 13:50:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:16,095 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:16,095 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:16,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,297 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:16,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash -383282925, now seen corresponding path program 60 times [2021-05-03 13:50:16,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:16,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124957295] [2021-05-03 13:50:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:16,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:16,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656394138] [2021-05-03 13:50:16,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:16,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:16,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:16,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:16,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:16,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:50:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:16,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:16,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:16,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:16,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-05-03 13:50:16,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:16,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:16,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-05-03 13:50:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124957295] [2021-05-03 13:50:16,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:16,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656394138] [2021-05-03 13:50:16,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:16,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:16,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159388781] [2021-05-03 13:50:16,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:16,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:16,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:16,480 INFO L87 Difference]: Start difference. First operand 182 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:16,631 INFO L93 Difference]: Finished difference Result 226 states and 563 transitions. [2021-05-03 13:50:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:16,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:16,632 INFO L225 Difference]: With dead ends: 226 [2021-05-03 13:50:16,632 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 13:50:16,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 13:50:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 185. [2021-05-03 13:50:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.608695652173913) internal successors, (480), 184 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 480 transitions. [2021-05-03 13:50:16,635 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 480 transitions. Word has length 15 [2021-05-03 13:50:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:16,635 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 480 transitions. [2021-05-03 13:50:16,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 480 transitions. [2021-05-03 13:50:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:16,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:16,636 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:16,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,858 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash -494105445, now seen corresponding path program 61 times [2021-05-03 13:50:16,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:16,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810353278] [2021-05-03 13:50:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:16,861 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:16,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622256524] [2021-05-03 13:50:16,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:16,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:16,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810353278] [2021-05-03 13:50:16,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622256524] [2021-05-03 13:50:16,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:16,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:16,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928420069] [2021-05-03 13:50:16,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:16,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:16,976 INFO L87 Difference]: Start difference. First operand 185 states and 480 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:17,191 INFO L93 Difference]: Finished difference Result 250 states and 632 transitions. [2021-05-03 13:50:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:17,193 INFO L225 Difference]: With dead ends: 250 [2021-05-03 13:50:17,193 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 13:50:17,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 13:50:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 181. [2021-05-03 13:50:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-05-03 13:50:17,199 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-05-03 13:50:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:17,199 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-05-03 13:50:17,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-05-03 13:50:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:17,199 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:17,199 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:17,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:17,422 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:17,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 261769119, now seen corresponding path program 62 times [2021-05-03 13:50:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:17,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416321912] [2021-05-03 13:50:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:17,424 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:17,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75975788] [2021-05-03 13:50:17,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:17,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:17,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:17,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 13:50:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:17,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 13:50:17,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:17,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:17,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:17,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:17,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:17,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:17,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:17,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-05-03 13:50:17,616 INFO L446 ElimStorePlain]: Different costs {0=[v_A_46], 2=[F]} [2021-05-03 13:50:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:17,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:17,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:17,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-05-03 13:50:17,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-05-03 13:50:17,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:17,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:17,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:26 [2021-05-03 13:50:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416321912] [2021-05-03 13:50:17,777 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75975788] [2021-05-03 13:50:17,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:17,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679893865] [2021-05-03 13:50:17,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:17,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:17,779 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:17,937 INFO L93 Difference]: Finished difference Result 224 states and 562 transitions. [2021-05-03 13:50:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:17,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:17,938 INFO L225 Difference]: With dead ends: 224 [2021-05-03 13:50:17,938 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 13:50:17,938 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 13:50:17,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 181. [2021-05-03 13:50:17,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.5833333333333335) internal successors, (465), 180 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) [2021-05-03 13:50:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 465 transitions. [2021-05-03 13:50:17,941 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 465 transitions. Word has length 15 [2021-05-03 13:50:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:17,942 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 465 transitions. [2021-05-03 13:50:17,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 465 transitions. [2021-05-03 13:50:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:17,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:17,942 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:18,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 13:50:18,157 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1980112825, now seen corresponding path program 63 times [2021-05-03 13:50:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:18,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416020059] [2021-05-03 13:50:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:18,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:18,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364307511] [2021-05-03 13:50:18,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:50:18,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416020059] [2021-05-03 13:50:18,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:18,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364307511] [2021-05-03 13:50:18,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:18,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932786929] [2021-05-03 13:50:18,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:18,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:18,286 INFO L87 Difference]: Start difference. First operand 181 states and 465 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:18,418 INFO L93 Difference]: Finished difference Result 289 states and 694 transitions. [2021-05-03 13:50:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:18,419 INFO L225 Difference]: With dead ends: 289 [2021-05-03 13:50:18,419 INFO L226 Difference]: Without dead ends: 284 [2021-05-03 13:50:18,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-03 13:50:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 178. [2021-05-03 13:50:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5762711864406778) internal successors, (456), 177 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2021-05-03 13:50:18,422 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2021-05-03 13:50:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:18,422 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2021-05-03 13:50:18,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2021-05-03 13:50:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:18,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:18,423 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:18,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,630 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash -17793999, now seen corresponding path program 64 times [2021-05-03 13:50:18,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:18,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559680447] [2021-05-03 13:50:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:18,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:18,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700858907] [2021-05-03 13:50:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:18,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:18,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:18,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559680447] [2021-05-03 13:50:18,827 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:18,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700858907] [2021-05-03 13:50:18,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:18,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:18,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765212250] [2021-05-03 13:50:18,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:18,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:18,828 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,042 INFO L93 Difference]: Finished difference Result 221 states and 558 transitions. [2021-05-03 13:50:19,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:19,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,043 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:50:19,043 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:50:19,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:50:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2021-05-03 13:50:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.5842696629213484) internal successors, (460), 178 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 460 transitions. [2021-05-03 13:50:19,046 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 460 transitions. Word has length 15 [2021-05-03 13:50:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,046 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 460 transitions. [2021-05-03 13:50:19,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 460 transitions. [2021-05-03 13:50:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:19,047 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,047 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:19,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,261 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:19,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:19,261 INFO L82 PathProgramCache]: Analyzing trace with hash 833223925, now seen corresponding path program 65 times [2021-05-03 13:50:19,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:19,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836339690] [2021-05-03 13:50:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:19,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:19,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417456831] [2021-05-03 13:50:19,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:19,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836339690] [2021-05-03 13:50:19,384 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:19,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417456831] [2021-05-03 13:50:19,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:19,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:19,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063369026] [2021-05-03 13:50:19,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:19,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:19,385 INFO L87 Difference]: Start difference. First operand 179 states and 460 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,486 INFO L93 Difference]: Finished difference Result 242 states and 593 transitions. [2021-05-03 13:50:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,487 INFO L225 Difference]: With dead ends: 242 [2021-05-03 13:50:19,487 INFO L226 Difference]: Without dead ends: 237 [2021-05-03 13:50:19,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:19,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-03 13:50:19,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 178. [2021-05-03 13:50:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.5875706214689265) internal successors, (458), 177 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 458 transitions. [2021-05-03 13:50:19,490 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 458 transitions. Word has length 15 [2021-05-03 13:50:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,490 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 458 transitions. [2021-05-03 13:50:19,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 458 transitions. [2021-05-03 13:50:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:19,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,491 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:19,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,691 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash 640027, now seen corresponding path program 66 times [2021-05-03 13:50:19,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:19,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756313479] [2021-05-03 13:50:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:19,693 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:19,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243168320] [2021-05-03 13:50:19,693 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 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 [2021-05-03 13:50:19,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:19,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756313479] [2021-05-03 13:50:19,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:19,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243168320] [2021-05-03 13:50:19,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:19,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:19,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299273243] [2021-05-03 13:50:19,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:19,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:19,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:19,787 INFO L87 Difference]: Start difference. First operand 178 states and 458 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,904 INFO L93 Difference]: Finished difference Result 235 states and 577 transitions. [2021-05-03 13:50:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,905 INFO L225 Difference]: With dead ends: 235 [2021-05-03 13:50:19,905 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 13:50:19,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 13:50:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2021-05-03 13:50:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2021-05-03 13:50:19,907 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 15 [2021-05-03 13:50:19,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,908 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2021-05-03 13:50:19,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2021-05-03 13:50:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:19,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,908 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:20,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:20,109 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1724965639, now seen corresponding path program 67 times [2021-05-03 13:50:20,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:20,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455694477] [2021-05-03 13:50:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:20,111 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:20,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801228099] [2021-05-03 13:50:20,111 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 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 [2021-05-03 13:50:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:20,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455694477] [2021-05-03 13:50:20,210 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:20,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801228099] [2021-05-03 13:50:20,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:20,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:20,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233696093] [2021-05-03 13:50:20,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:20,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:20,211 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:20,310 INFO L93 Difference]: Finished difference Result 231 states and 582 transitions. [2021-05-03 13:50:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:20,312 INFO L225 Difference]: With dead ends: 231 [2021-05-03 13:50:20,312 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 13:50:20,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 13:50:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 183. [2021-05-03 13:50:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.6043956043956045) internal successors, (474), 182 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 474 transitions. [2021-05-03 13:50:20,315 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 474 transitions. Word has length 15 [2021-05-03 13:50:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:20,315 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 474 transitions. [2021-05-03 13:50:20,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 474 transitions. [2021-05-03 13:50:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:20,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:20,316 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:20,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 13:50:20,525 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:20,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2128376761, now seen corresponding path program 68 times [2021-05-03 13:50:20,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:20,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275927364] [2021-05-03 13:50:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:20,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:20,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65840239] [2021-05-03 13:50:20,528 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 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 [2021-05-03 13:50:20,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275927364] [2021-05-03 13:50:20,636 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:20,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65840239] [2021-05-03 13:50:20,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:20,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964911335] [2021-05-03 13:50:20,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:20,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:20,637 INFO L87 Difference]: Start difference. First operand 183 states and 474 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:20,792 INFO L93 Difference]: Finished difference Result 237 states and 595 transitions. [2021-05-03 13:50:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:20,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:20,793 INFO L225 Difference]: With dead ends: 237 [2021-05-03 13:50:20,793 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 13:50:20,793 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 13:50:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 182. [2021-05-03 13:50:20,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.596685082872928) internal successors, (470), 181 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 470 transitions. [2021-05-03 13:50:20,797 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 470 transitions. Word has length 15 [2021-05-03 13:50:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:20,797 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 470 transitions. [2021-05-03 13:50:20,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 470 transitions. [2021-05-03 13:50:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:20,798 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:20,798 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:21,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,015 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1315572611, now seen corresponding path program 69 times [2021-05-03 13:50:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:21,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537643084] [2021-05-03 13:50:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:21,017 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:21,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748570760] [2021-05-03 13:50:21,017 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 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 [2021-05-03 13:50:21,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537643084] [2021-05-03 13:50:21,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748570760] [2021-05-03 13:50:21,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:21,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472430726] [2021-05-03 13:50:21,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:21,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:21,115 INFO L87 Difference]: Start difference. First operand 182 states and 470 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:21,211 INFO L93 Difference]: Finished difference Result 245 states and 603 transitions. [2021-05-03 13:50:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:21,212 INFO L225 Difference]: With dead ends: 245 [2021-05-03 13:50:21,212 INFO L226 Difference]: Without dead ends: 240 [2021-05-03 13:50:21,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-03 13:50:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 181. [2021-05-03 13:50:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-05-03 13:50:21,215 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-05-03 13:50:21,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:21,215 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-05-03 13:50:21,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-05-03 13:50:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:21,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:21,216 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:21,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 13:50:21,429 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:21,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2146810787, now seen corresponding path program 70 times [2021-05-03 13:50:21,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:21,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895892921] [2021-05-03 13:50:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:21,431 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:21,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199854386] [2021-05-03 13:50:21,431 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 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 [2021-05-03 13:50:21,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:21,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895892921] [2021-05-03 13:50:21,544 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:21,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199854386] [2021-05-03 13:50:21,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:21,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866782116] [2021-05-03 13:50:21,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:21,544 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:21,661 INFO L93 Difference]: Finished difference Result 232 states and 579 transitions. [2021-05-03 13:50:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:21,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:21,662 INFO L225 Difference]: With dead ends: 232 [2021-05-03 13:50:21,663 INFO L226 Difference]: Without dead ends: 229 [2021-05-03 13:50:21,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-03 13:50:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 181. [2021-05-03 13:50:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.588888888888889) internal successors, (466), 180 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 466 transitions. [2021-05-03 13:50:21,666 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 466 transitions. Word has length 15 [2021-05-03 13:50:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:21,666 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 466 transitions. [2021-05-03 13:50:21,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 466 transitions. [2021-05-03 13:50:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:21,667 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:21,667 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:21,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,877 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash 421205121, now seen corresponding path program 71 times [2021-05-03 13:50:21,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:21,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502755054] [2021-05-03 13:50:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:21,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:21,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782977600] [2021-05-03 13:50:21,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:21,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:21,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:21,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502755054] [2021-05-03 13:50:22,014 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:22,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782977600] [2021-05-03 13:50:22,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:22,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:22,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468135530] [2021-05-03 13:50:22,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:22,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:22,015 INFO L87 Difference]: Start difference. First operand 181 states and 466 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:22,105 INFO L93 Difference]: Finished difference Result 228 states and 572 transitions. [2021-05-03 13:50:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:22,106 INFO L225 Difference]: With dead ends: 228 [2021-05-03 13:50:22,106 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 13:50:22,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 13:50:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 177. [2021-05-03 13:50:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.5625) internal successors, (451), 176 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 451 transitions. [2021-05-03 13:50:22,110 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 451 transitions. Word has length 15 [2021-05-03 13:50:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:22,110 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 451 transitions. [2021-05-03 13:50:22,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 451 transitions. [2021-05-03 13:50:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:22,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:22,111 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:22,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 13:50:22,321 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1576701703, now seen corresponding path program 72 times [2021-05-03 13:50:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:22,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017237342] [2021-05-03 13:50:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:22,323 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:22,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348943109] [2021-05-03 13:50:22,323 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:22,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:22,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:22,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:22,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:22,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:22,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:22,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:22,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:50:22,450 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-05-03 13:50:22,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2021-05-03 13:50:22,452 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:22,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:22,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-03 13:50:22,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:22,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:22,472 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:19 [2021-05-03 13:50:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017237342] [2021-05-03 13:50:22,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:22,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348943109] [2021-05-03 13:50:22,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:22,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471078272] [2021-05-03 13:50:22,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:22,522 INFO L87 Difference]: Start difference. First operand 177 states and 451 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:22,618 INFO L93 Difference]: Finished difference Result 209 states and 519 transitions. [2021-05-03 13:50:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:22,619 INFO L225 Difference]: With dead ends: 209 [2021-05-03 13:50:22,619 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 13:50:22,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 13:50:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 181. [2021-05-03 13:50:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.55) internal successors, (459), 180 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 459 transitions. [2021-05-03 13:50:22,623 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 459 transitions. Word has length 15 [2021-05-03 13:50:22,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:22,623 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 459 transitions. [2021-05-03 13:50:22,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 459 transitions. [2021-05-03 13:50:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:22,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:22,623 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:22,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:22,837 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1215828351, now seen corresponding path program 73 times [2021-05-03 13:50:22,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:22,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821043819] [2021-05-03 13:50:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:22,838 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133306029] [2021-05-03 13:50:22,839 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 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 [2021-05-03 13:50:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821043819] [2021-05-03 13:50:22,955 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133306029] [2021-05-03 13:50:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:22,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:22,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181953047] [2021-05-03 13:50:22,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:22,956 INFO L87 Difference]: Start difference. First operand 181 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,091 INFO L93 Difference]: Finished difference Result 206 states and 514 transitions. [2021-05-03 13:50:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:23,091 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:23,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,092 INFO L225 Difference]: With dead ends: 206 [2021-05-03 13:50:23,092 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 13:50:23,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 13:50:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 183. [2021-05-03 13:50:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5549450549450547) internal successors, (465), 182 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) [2021-05-03 13:50:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 465 transitions. [2021-05-03 13:50:23,096 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 465 transitions. Word has length 15 [2021-05-03 13:50:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,096 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 465 transitions. [2021-05-03 13:50:23,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 465 transitions. [2021-05-03 13:50:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:23,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,096 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:23,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,317 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash 502515355, now seen corresponding path program 74 times [2021-05-03 13:50:23,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:23,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719368244] [2021-05-03 13:50:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:23,319 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:23,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055189573] [2021-05-03 13:50:23,319 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 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 [2021-05-03 13:50:23,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:23,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:23,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719368244] [2021-05-03 13:50:23,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:23,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055189573] [2021-05-03 13:50:23,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:23,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:23,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097874824] [2021-05-03 13:50:23,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:23,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:23,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:23,426 INFO L87 Difference]: Start difference. First operand 183 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,581 INFO L93 Difference]: Finished difference Result 235 states and 578 transitions. [2021-05-03 13:50:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,582 INFO L225 Difference]: With dead ends: 235 [2021-05-03 13:50:23,582 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 13:50:23,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:50:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 13:50:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 185. [2021-05-03 13:50:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5706521739130435) internal successors, (473), 184 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 473 transitions. [2021-05-03 13:50:23,585 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 473 transitions. Word has length 15 [2021-05-03 13:50:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,585 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 473 transitions. [2021-05-03 13:50:23,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 473 transitions. [2021-05-03 13:50:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:23,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,585 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:23,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,786 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:23,786 INFO L82 PathProgramCache]: Analyzing trace with hash 391692835, now seen corresponding path program 75 times [2021-05-03 13:50:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:23,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525659457] [2021-05-03 13:50:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:23,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:23,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881732861] [2021-05-03 13:50:23,788 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 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 [2021-05-03 13:50:23,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:23,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:23,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:23,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525659457] [2021-05-03 13:50:23,871 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:23,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881732861] [2021-05-03 13:50:23,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:23,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599803028] [2021-05-03 13:50:23,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:23,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:23,872 INFO L87 Difference]: Start difference. First operand 185 states and 473 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,949 INFO L93 Difference]: Finished difference Result 240 states and 598 transitions. [2021-05-03 13:50:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,950 INFO L225 Difference]: With dead ends: 240 [2021-05-03 13:50:23,950 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 13:50:23,951 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 13:50:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 179. [2021-05-03 13:50:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-05-03 13:50:23,953 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 15 [2021-05-03 13:50:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,953 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-05-03 13:50:23,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,953 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-05-03 13:50:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:23,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,953 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:24,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,154 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:24,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash -581479935, now seen corresponding path program 76 times [2021-05-03 13:50:24,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:24,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765846501] [2021-05-03 13:50:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:24,156 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:24,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649411288] [2021-05-03 13:50:24,156 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 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 [2021-05-03 13:50:24,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765846501] [2021-05-03 13:50:24,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649411288] [2021-05-03 13:50:24,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:24,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:24,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396131493] [2021-05-03 13:50:24,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:24,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:24,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:24,265 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:24,399 INFO L93 Difference]: Finished difference Result 282 states and 672 transitions. [2021-05-03 13:50:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:24,400 INFO L225 Difference]: With dead ends: 282 [2021-05-03 13:50:24,400 INFO L226 Difference]: Without dead ends: 276 [2021-05-03 13:50:24,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:24,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-03 13:50:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 184. [2021-05-03 13:50:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.557377049180328) internal successors, (468), 183 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 468 transitions. [2021-05-03 13:50:24,403 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 468 transitions. Word has length 15 [2021-05-03 13:50:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:24,403 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 468 transitions. [2021-05-03 13:50:24,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 468 transitions. [2021-05-03 13:50:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:24,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:24,404 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:24,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,604 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1147567399, now seen corresponding path program 77 times [2021-05-03 13:50:24,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:24,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576104538] [2021-05-03 13:50:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:24,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:24,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739767197] [2021-05-03 13:50:24,607 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 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 [2021-05-03 13:50:24,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:24,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:24,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576104538] [2021-05-03 13:50:24,728 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:24,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739767197] [2021-05-03 13:50:24,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:24,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322670015] [2021-05-03 13:50:24,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:24,729 INFO L87 Difference]: Start difference. First operand 184 states and 468 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:24,887 INFO L93 Difference]: Finished difference Result 307 states and 724 transitions. [2021-05-03 13:50:24,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:24,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:24,888 INFO L225 Difference]: With dead ends: 307 [2021-05-03 13:50:24,888 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 13:50:24,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 13:50:24,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 185. [2021-05-03 13:50:24,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5597826086956523) internal successors, (471), 184 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2021-05-03 13:50:24,891 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 15 [2021-05-03 13:50:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:24,891 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2021-05-03 13:50:24,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2021-05-03 13:50:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:24,892 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:24,892 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,092 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1429056191, now seen corresponding path program 78 times [2021-05-03 13:50:25,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094635479] [2021-05-03 13:50:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,094 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:25,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024287149] [2021-05-03 13:50:25,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:25,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:25,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:25,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:25,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:25,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:25,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:25,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:25,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-05-03 13:50:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 13:50:25,194 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:25,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:25,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:25,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:25,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:25,208 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-05-03 13:50:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094635479] [2021-05-03 13:50:25,240 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:25,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024287149] [2021-05-03 13:50:25,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:25,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:25,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210589204] [2021-05-03 13:50:25,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:25,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:25,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:25,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:25,241 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:25,354 INFO L93 Difference]: Finished difference Result 232 states and 578 transitions. [2021-05-03 13:50:25,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:25,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:25,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:25,355 INFO L225 Difference]: With dead ends: 232 [2021-05-03 13:50:25,355 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 13:50:25,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:25,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 13:50:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-05-03 13:50:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5597826086956523) internal successors, (471), 184 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 471 transitions. [2021-05-03 13:50:25,358 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 471 transitions. Word has length 15 [2021-05-03 13:50:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,358 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 471 transitions. [2021-05-03 13:50:25,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 471 transitions. [2021-05-03 13:50:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:25,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,358 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,559 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1719022205, now seen corresponding path program 79 times [2021-05-03 13:50:25,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687426101] [2021-05-03 13:50:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,561 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:25,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119974458] [2021-05-03 13:50:25,561 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 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 [2021-05-03 13:50:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:25,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687426101] [2021-05-03 13:50:25,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119974458] [2021-05-03 13:50:25,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:25,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:25,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751671818] [2021-05-03 13:50:25,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:25,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:25,661 INFO L87 Difference]: Start difference. First operand 185 states and 471 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:25,780 INFO L93 Difference]: Finished difference Result 275 states and 670 transitions. [2021-05-03 13:50:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:25,782 INFO L225 Difference]: With dead ends: 275 [2021-05-03 13:50:25,782 INFO L226 Difference]: Without dead ends: 270 [2021-05-03 13:50:25,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-03 13:50:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 189. [2021-05-03 13:50:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 188 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 486 transitions. [2021-05-03 13:50:25,785 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 486 transitions. Word has length 15 [2021-05-03 13:50:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,785 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 486 transitions. [2021-05-03 13:50:25,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 486 transitions. [2021-05-03 13:50:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:25,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,785 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 13:50:25,986 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash -857601385, now seen corresponding path program 80 times [2021-05-03 13:50:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965963861] [2021-05-03 13:50:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:25,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663572055] [2021-05-03 13:50:25,988 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 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 [2021-05-03 13:50:26,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:26,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965963861] [2021-05-03 13:50:26,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:26,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663572055] [2021-05-03 13:50:26,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:26,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:26,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671198980] [2021-05-03 13:50:26,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:26,078 INFO L87 Difference]: Start difference. First operand 189 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:26,226 INFO L93 Difference]: Finished difference Result 289 states and 695 transitions. [2021-05-03 13:50:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:26,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:26,227 INFO L225 Difference]: With dead ends: 289 [2021-05-03 13:50:26,227 INFO L226 Difference]: Without dead ends: 285 [2021-05-03 13:50:26,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-03 13:50:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 190. [2021-05-03 13:50:26,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5925925925925926) internal successors, (490), 189 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 490 transitions. [2021-05-03 13:50:26,230 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 490 transitions. Word has length 15 [2021-05-03 13:50:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:26,230 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 490 transitions. [2021-05-03 13:50:26,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 490 transitions. [2021-05-03 13:50:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:26,231 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:26,231 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:26,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:26,431 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 886438307, now seen corresponding path program 81 times [2021-05-03 13:50:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:26,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712579610] [2021-05-03 13:50:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:26,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:26,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884552469] [2021-05-03 13:50:26,434 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 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 [2021-05-03 13:50:26,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:26,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712579610] [2021-05-03 13:50:26,554 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:26,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884552469] [2021-05-03 13:50:26,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:26,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:26,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360082725] [2021-05-03 13:50:26,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:26,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:26,555 INFO L87 Difference]: Start difference. First operand 190 states and 490 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:26,685 INFO L93 Difference]: Finished difference Result 220 states and 554 transitions. [2021-05-03 13:50:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:26,687 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:50:26,687 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:50:26,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:50:26,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-05-03 13:50:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5925925925925926) internal successors, (490), 189 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 490 transitions. [2021-05-03 13:50:26,690 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 490 transitions. Word has length 15 [2021-05-03 13:50:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:26,690 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 490 transitions. [2021-05-03 13:50:26,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 490 transitions. [2021-05-03 13:50:26,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:26,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:26,691 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:26,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 13:50:26,913 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -839167359, now seen corresponding path program 82 times [2021-05-03 13:50:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:26,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278419420] [2021-05-03 13:50:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:26,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:26,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799996008] [2021-05-03 13:50:26,915 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 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 [2021-05-03 13:50:26,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:26,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278419420] [2021-05-03 13:50:27,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:27,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799996008] [2021-05-03 13:50:27,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:27,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:27,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160617077] [2021-05-03 13:50:27,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:27,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:27,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:27,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:27,021 INFO L87 Difference]: Start difference. First operand 190 states and 490 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,136 INFO L93 Difference]: Finished difference Result 264 states and 660 transitions. [2021-05-03 13:50:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,137 INFO L225 Difference]: With dead ends: 264 [2021-05-03 13:50:27,137 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 13:50:27,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 13:50:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2021-05-03 13:50:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 188 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 486 transitions. [2021-05-03 13:50:27,140 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 486 transitions. Word has length 15 [2021-05-03 13:50:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,140 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 486 transitions. [2021-05-03 13:50:27,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 486 transitions. [2021-05-03 13:50:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:27,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,141 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:27,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 13:50:27,342 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -429774331, now seen corresponding path program 83 times [2021-05-03 13:50:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:27,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205234235] [2021-05-03 13:50:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:27,345 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:27,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064126128] [2021-05-03 13:50:27,345 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 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 [2021-05-03 13:50:27,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:27,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:27,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:27,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205234235] [2021-05-03 13:50:27,439 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:27,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064126128] [2021-05-03 13:50:27,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:27,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888646583] [2021-05-03 13:50:27,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:27,442 INFO L87 Difference]: Start difference. First operand 189 states and 486 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,541 INFO L93 Difference]: Finished difference Result 269 states and 655 transitions. [2021-05-03 13:50:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,543 INFO L225 Difference]: With dead ends: 269 [2021-05-03 13:50:27,543 INFO L226 Difference]: Without dead ends: 264 [2021-05-03 13:50:27,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-03 13:50:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 184. [2021-05-03 13:50:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5628415300546448) internal successors, (469), 183 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 469 transitions. [2021-05-03 13:50:27,546 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 469 transitions. Word has length 15 [2021-05-03 13:50:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,546 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 469 transitions. [2021-05-03 13:50:27,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 469 transitions. [2021-05-03 13:50:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:27,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,547 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:27,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 13:50:27,747 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1262358229, now seen corresponding path program 84 times [2021-05-03 13:50:27,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:27,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080796527] [2021-05-03 13:50:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:27,749 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:27,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122453585] [2021-05-03 13:50:27,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:27,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:27,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080796527] [2021-05-03 13:50:27,852 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122453585] [2021-05-03 13:50:27,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:27,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:27,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405174527] [2021-05-03 13:50:27,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:27,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:27,853 INFO L87 Difference]: Start difference. First operand 184 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,972 INFO L93 Difference]: Finished difference Result 225 states and 560 transitions. [2021-05-03 13:50:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,973 INFO L225 Difference]: With dead ends: 225 [2021-05-03 13:50:27,973 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 13:50:27,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 13:50:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-05-03 13:50:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5628415300546448) internal successors, (469), 183 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 469 transitions. [2021-05-03 13:50:27,978 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 469 transitions. Word has length 15 [2021-05-03 13:50:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,979 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 469 transitions. [2021-05-03 13:50:27,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,979 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 469 transitions. [2021-05-03 13:50:27,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:27,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,979 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:28,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 13:50:28,180 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:28,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1307003401, now seen corresponding path program 85 times [2021-05-03 13:50:28,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:28,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695401294] [2021-05-03 13:50:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:28,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:28,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930384325] [2021-05-03 13:50:28,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695401294] [2021-05-03 13:50:28,289 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:28,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930384325] [2021-05-03 13:50:28,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:28,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437176376] [2021-05-03 13:50:28,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:28,290 INFO L87 Difference]: Start difference. First operand 184 states and 469 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:28,427 INFO L93 Difference]: Finished difference Result 255 states and 632 transitions. [2021-05-03 13:50:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:28,429 INFO L225 Difference]: With dead ends: 255 [2021-05-03 13:50:28,429 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 13:50:28,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 13:50:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 182. [2021-05-03 13:50:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.546961325966851) internal successors, (461), 181 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 461 transitions. [2021-05-03 13:50:28,432 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 461 transitions. Word has length 15 [2021-05-03 13:50:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 461 transitions. [2021-05-03 13:50:28,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 461 transitions. [2021-05-03 13:50:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:28,433 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:28,433 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:28,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 13:50:28,634 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:28,634 INFO L82 PathProgramCache]: Analyzing trace with hash -690903423, now seen corresponding path program 86 times [2021-05-03 13:50:28,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:28,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382706554] [2021-05-03 13:50:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:28,636 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:28,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057105400] [2021-05-03 13:50:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:28,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:28,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382706554] [2021-05-03 13:50:28,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:28,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057105400] [2021-05-03 13:50:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005133022] [2021-05-03 13:50:28,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:28,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:28,735 INFO L87 Difference]: Start difference. First operand 182 states and 461 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:28,850 INFO L93 Difference]: Finished difference Result 221 states and 547 transitions. [2021-05-03 13:50:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:28,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:28,851 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:50:28,851 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:50:28,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:50:28,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 180. [2021-05-03 13:50:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.558659217877095) internal successors, (458), 179 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 458 transitions. [2021-05-03 13:50:28,854 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 458 transitions. Word has length 15 [2021-05-03 13:50:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:28,854 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 458 transitions. [2021-05-03 13:50:28,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 458 transitions. [2021-05-03 13:50:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:28,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:28,854 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,055 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1671806591, now seen corresponding path program 87 times [2021-05-03 13:50:29,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039344470] [2021-05-03 13:50:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:29,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748832680] [2021-05-03 13:50:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:29,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039344470] [2021-05-03 13:50:29,152 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:29,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748832680] [2021-05-03 13:50:29,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:29,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:29,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173831273] [2021-05-03 13:50:29,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:29,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:29,153 INFO L87 Difference]: Start difference. First operand 180 states and 458 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:29,268 INFO L93 Difference]: Finished difference Result 246 states and 602 transitions. [2021-05-03 13:50:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:29,269 INFO L225 Difference]: With dead ends: 246 [2021-05-03 13:50:29,269 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 13:50:29,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 13:50:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 177. [2021-05-03 13:50:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.539772727272727) internal successors, (447), 176 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) [2021-05-03 13:50:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 447 transitions. [2021-05-03 13:50:29,271 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 447 transitions. Word has length 15 [2021-05-03 13:50:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:29,272 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 447 transitions. [2021-05-03 13:50:29,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 447 transitions. [2021-05-03 13:50:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:29,272 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:29,272 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 13:50:29,477 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1920083453, now seen corresponding path program 88 times [2021-05-03 13:50:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162141904] [2021-05-03 13:50:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,479 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:29,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372401135] [2021-05-03 13:50:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:29,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:29,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162141904] [2021-05-03 13:50:29,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:29,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372401135] [2021-05-03 13:50:29,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:29,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697923831] [2021-05-03 13:50:29,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:29,591 INFO L87 Difference]: Start difference. First operand 177 states and 447 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:29,763 INFO L93 Difference]: Finished difference Result 221 states and 538 transitions. [2021-05-03 13:50:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:50:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:29,764 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:50:29,765 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:50:29,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:50:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:50:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 176. [2021-05-03 13:50:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.525714285714286) internal successors, (442), 175 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 442 transitions. [2021-05-03 13:50:29,772 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 442 transitions. Word has length 15 [2021-05-03 13:50:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:29,772 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 442 transitions. [2021-05-03 13:50:29,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 442 transitions. [2021-05-03 13:50:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:29,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:29,772 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 13:50:29,973 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1523865919, now seen corresponding path program 89 times [2021-05-03 13:50:29,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953602642] [2021-05-03 13:50:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,975 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:29,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483500516] [2021-05-03 13:50:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:29,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:30,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:50:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:30,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:30,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:30,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 13:50:30,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,111 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:16 [2021-05-03 13:50:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:30,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953602642] [2021-05-03 13:50:30,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:30,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483500516] [2021-05-03 13:50:30,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:30,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169736221] [2021-05-03 13:50:30,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:30,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:30,133 INFO L87 Difference]: Start difference. First operand 176 states and 442 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:30,242 INFO L93 Difference]: Finished difference Result 216 states and 526 transitions. [2021-05-03 13:50:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:30,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:30,243 INFO L225 Difference]: With dead ends: 216 [2021-05-03 13:50:30,243 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 13:50:30,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 13:50:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-05-03 13:50:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.52) internal successors, (441), 175 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 441 transitions. [2021-05-03 13:50:30,245 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 441 transitions. Word has length 15 [2021-05-03 13:50:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:30,245 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 441 transitions. [2021-05-03 13:50:30,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 441 transitions. [2021-05-03 13:50:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:50:30,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:30,246 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 13:50:30,446 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash 194477787, now seen corresponding path program 90 times [2021-05-03 13:50:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975420131] [2021-05-03 13:50:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,448 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:30,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446157374] [2021-05-03 13:50:30,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:30,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:30,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975420131] [2021-05-03 13:50:30,555 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:30,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446157374] [2021-05-03 13:50:30,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:30,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:50:30,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95031314] [2021-05-03 13:50:30,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:30,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:30,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:30,556 INFO L87 Difference]: Start difference. First operand 176 states and 441 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:30,678 INFO L93 Difference]: Finished difference Result 260 states and 623 transitions. [2021-05-03 13:50:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:50:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:30,679 INFO L225 Difference]: With dead ends: 260 [2021-05-03 13:50:30,679 INFO L226 Difference]: Without dead ends: 256 [2021-05-03 13:50:30,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-03 13:50:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 174. [2021-05-03 13:50:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.508670520231214) internal successors, (434), 173 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 434 transitions. [2021-05-03 13:50:30,682 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 434 transitions. Word has length 15 [2021-05-03 13:50:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:30,682 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 434 transitions. [2021-05-03 13:50:30,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 434 transitions. [2021-05-03 13:50:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:30,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:30,683 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-03 13:50:30,883 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1436869033, now seen corresponding path program 91 times [2021-05-03 13:50:30,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807344135] [2021-05-03 13:50:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,886 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:30,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829862729] [2021-05-03 13:50:30,886 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 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 [2021-05-03 13:50:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:30,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-05-03 13:50:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:30,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-05-03 13:50:30,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:30,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:30,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:30,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:31,018 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:31,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:31,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:31,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807344135] [2021-05-03 13:50:31,091 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:31,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829862729] [2021-05-03 13:50:31,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:31,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:31,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009014230] [2021-05-03 13:50:31,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:31,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:31,092 INFO L87 Difference]: Start difference. First operand 174 states and 434 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,276 INFO L93 Difference]: Finished difference Result 211 states and 510 transitions. [2021-05-03 13:50:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,277 INFO L225 Difference]: With dead ends: 211 [2021-05-03 13:50:31,277 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 13:50:31,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 13:50:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 183. [2021-05-03 13:50:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5) internal successors, (455), 182 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) [2021-05-03 13:50:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 455 transitions. [2021-05-03 13:50:31,280 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 455 transitions. Word has length 16 [2021-05-03 13:50:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,280 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 455 transitions. [2021-05-03 13:50:31,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 455 transitions. [2021-05-03 13:50:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:31,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,280 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:31,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,485 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 565945223, now seen corresponding path program 92 times [2021-05-03 13:50:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:31,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758152395] [2021-05-03 13:50:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:31,487 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:31,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225161998] [2021-05-03 13:50:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:31,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:31,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:31,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758152395] [2021-05-03 13:50:31,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:31,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225161998] [2021-05-03 13:50:31,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:31,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-03 13:50:31,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743598370] [2021-05-03 13:50:31,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:31,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:31,583 INFO L87 Difference]: Start difference. First operand 183 states and 455 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,686 INFO L93 Difference]: Finished difference Result 236 states and 555 transitions. [2021-05-03 13:50:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:31,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,687 INFO L225 Difference]: With dead ends: 236 [2021-05-03 13:50:31,687 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 13:50:31,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 13:50:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 167. [2021-05-03 13:50:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 166 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 408 transitions. [2021-05-03 13:50:31,689 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 408 transitions. Word has length 16 [2021-05-03 13:50:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,689 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 408 transitions. [2021-05-03 13:50:31,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 408 transitions. [2021-05-03 13:50:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:31,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,690 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:31,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,890 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:31,890 INFO L82 PathProgramCache]: Analyzing trace with hash 447860743, now seen corresponding path program 93 times [2021-05-03 13:50:31,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:31,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879016948] [2021-05-03 13:50:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:31,893 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:31,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778918358] [2021-05-03 13:50:31,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:31,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:31,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 13:50:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:31,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:31,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:31,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:31,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:31,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:31,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:31,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:32,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-05-03 13:50:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:32,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:32,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:31 [2021-05-03 13:50:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879016948] [2021-05-03 13:50:32,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778918358] [2021-05-03 13:50:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:32,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-03 13:50:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838297446] [2021-05-03 13:50:32,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:32,144 INFO L87 Difference]: Start difference. First operand 167 states and 408 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:32,305 INFO L93 Difference]: Finished difference Result 196 states and 457 transitions. [2021-05-03 13:50:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:32,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:32,306 INFO L225 Difference]: With dead ends: 196 [2021-05-03 13:50:32,306 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 13:50:32,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 13:50:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 172. [2021-05-03 13:50:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.47953216374269) internal successors, (424), 171 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 424 transitions. [2021-05-03 13:50:32,312 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 424 transitions. Word has length 16 [2021-05-03 13:50:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:32,312 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 424 transitions. [2021-05-03 13:50:32,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 424 transitions. [2021-05-03 13:50:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:32,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:32,313 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:32,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 13:50:32,513 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2128762847, now seen corresponding path program 94 times [2021-05-03 13:50:32,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:32,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616756896] [2021-05-03 13:50:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:32,515 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:32,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347994462] [2021-05-03 13:50:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:32,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:32,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:32,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:50:32,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:32,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:32,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:32,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:32,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:32,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:32,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:32,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616756896] [2021-05-03 13:50:32,700 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:32,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347994462] [2021-05-03 13:50:32,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:32,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844530614] [2021-05-03 13:50:32,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:32,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:32,701 INFO L87 Difference]: Start difference. First operand 172 states and 424 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:32,845 INFO L93 Difference]: Finished difference Result 206 states and 482 transitions. [2021-05-03 13:50:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:32,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:32,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:32,846 INFO L225 Difference]: With dead ends: 206 [2021-05-03 13:50:32,846 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 13:50:32,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 13:50:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 173. [2021-05-03 13:50:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.488372093023256) internal successors, (428), 172 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 428 transitions. [2021-05-03 13:50:32,849 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 428 transitions. Word has length 16 [2021-05-03 13:50:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:32,849 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 428 transitions. [2021-05-03 13:50:32,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 428 transitions. [2021-05-03 13:50:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:32,849 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:32,849 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:33,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 13:50:33,050 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2110328821, now seen corresponding path program 95 times [2021-05-03 13:50:33,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:33,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212060056] [2021-05-03 13:50:33,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:33,052 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:33,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156081502] [2021-05-03 13:50:33,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:33,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:33,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-05-03 13:50:33,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:33,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:50:33,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:33,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:33,184 INFO L446 ElimStorePlain]: Different costs {0=[v_A_59], 5=[F]} [2021-05-03 13:50:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:33,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,213 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:33,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:33,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,219 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212060056] [2021-05-03 13:50:33,268 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:33,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156081502] [2021-05-03 13:50:33,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:33,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:33,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088775795] [2021-05-03 13:50:33,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:33,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:33,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:33,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:33,269 INFO L87 Difference]: Start difference. First operand 173 states and 428 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,428 INFO L93 Difference]: Finished difference Result 202 states and 477 transitions. [2021-05-03 13:50:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:33,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,430 INFO L225 Difference]: With dead ends: 202 [2021-05-03 13:50:33,430 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 13:50:33,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 13:50:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 174. [2021-05-03 13:50:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.4971098265895955) internal successors, (432), 173 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 432 transitions. [2021-05-03 13:50:33,433 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 432 transitions. Word has length 16 [2021-05-03 13:50:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,433 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 432 transitions. [2021-05-03 13:50:33,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 432 transitions. [2021-05-03 13:50:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:33,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,434 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:33,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:33,641 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash -794171517, now seen corresponding path program 96 times [2021-05-03 13:50:33,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:33,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812251549] [2021-05-03 13:50:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:33,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:33,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225538784] [2021-05-03 13:50:33,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:33,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:33,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:33,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2021-05-03 13:50:33,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:33,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:33,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:33,778 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:33,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:33,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:33,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:33,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812251549] [2021-05-03 13:50:33,844 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:33,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225538784] [2021-05-03 13:50:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:33,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:33,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026447094] [2021-05-03 13:50:33,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:33,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:33,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:33,844 INFO L87 Difference]: Start difference. First operand 174 states and 432 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,985 INFO L93 Difference]: Finished difference Result 206 states and 490 transitions. [2021-05-03 13:50:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,986 INFO L225 Difference]: With dead ends: 206 [2021-05-03 13:50:33,986 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 13:50:33,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 13:50:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 175. [2021-05-03 13:50:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.5057471264367814) internal successors, (436), 174 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 436 transitions. [2021-05-03 13:50:33,989 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 436 transitions. Word has length 16 [2021-05-03 13:50:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,989 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 436 transitions. [2021-05-03 13:50:33,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 436 transitions. [2021-05-03 13:50:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:33,990 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,990 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 13:50:34,190 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1351999243, now seen corresponding path program 97 times [2021-05-03 13:50:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782777424] [2021-05-03 13:50:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,193 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:34,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274393304] [2021-05-03 13:50:34,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:34,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:50:34,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:34,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:50:34,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:34,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:34,327 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:34,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:34,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:34,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:34,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782777424] [2021-05-03 13:50:34,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:34,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274393304] [2021-05-03 13:50:34,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:34,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:34,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974603810] [2021-05-03 13:50:34,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:34,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:34,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:34,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:34,395 INFO L87 Difference]: Start difference. First operand 175 states and 436 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:34,559 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2021-05-03 13:50:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:34,560 INFO L225 Difference]: With dead ends: 210 [2021-05-03 13:50:34,560 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 13:50:34,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:34,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 13:50:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-05-03 13:50:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5085714285714285) internal successors, (439), 175 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 439 transitions. [2021-05-03 13:50:34,563 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 439 transitions. Word has length 16 [2021-05-03 13:50:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:34,564 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 439 transitions. [2021-05-03 13:50:34,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 439 transitions. [2021-05-03 13:50:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:34,564 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:34,564 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,769 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 257907655, now seen corresponding path program 98 times [2021-05-03 13:50:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077716232] [2021-05-03 13:50:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,771 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:34,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428819203] [2021-05-03 13:50:34,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:34,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:34,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:34,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:34,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:50:34,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:34,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:50:34,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:34,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:34,887 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:34,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:34,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:34,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:34,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:34,904 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:34,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077716232] [2021-05-03 13:50:34,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:34,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428819203] [2021-05-03 13:50:34,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:34,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:34,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416799252] [2021-05-03 13:50:34,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:34,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:34,952 INFO L87 Difference]: Start difference. First operand 176 states and 439 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:35,131 INFO L93 Difference]: Finished difference Result 223 states and 531 transitions. [2021-05-03 13:50:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:35,132 INFO L225 Difference]: With dead ends: 223 [2021-05-03 13:50:35,132 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 13:50:35,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 13:50:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 180. [2021-05-03 13:50:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.53072625698324) internal successors, (453), 179 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) [2021-05-03 13:50:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 453 transitions. [2021-05-03 13:50:35,135 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 453 transitions. Word has length 16 [2021-05-03 13:50:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:35,136 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 453 transitions. [2021-05-03 13:50:35,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 453 transitions. [2021-05-03 13:50:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:35,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:35,136 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:35,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 13:50:35,353 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1618953449, now seen corresponding path program 99 times [2021-05-03 13:50:35,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:35,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767695751] [2021-05-03 13:50:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:35,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:35,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804667715] [2021-05-03 13:50:35,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:35,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:35,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:50:35,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:35,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:35,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:35,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:35,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:35,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:35,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767695751] [2021-05-03 13:50:35,556 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:35,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804667715] [2021-05-03 13:50:35,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:35,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:35,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761017636] [2021-05-03 13:50:35,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:35,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:35,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:35,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:35,557 INFO L87 Difference]: Start difference. First operand 180 states and 453 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:35,648 INFO L93 Difference]: Finished difference Result 193 states and 475 transitions. [2021-05-03 13:50:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:35,649 INFO L225 Difference]: With dead ends: 193 [2021-05-03 13:50:35,649 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 13:50:35,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 13:50:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2021-05-03 13:50:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.5359116022099446) internal successors, (459), 181 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 459 transitions. [2021-05-03 13:50:35,652 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 459 transitions. Word has length 16 [2021-05-03 13:50:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:35,652 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 459 transitions. [2021-05-03 13:50:35,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 459 transitions. [2021-05-03 13:50:35,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:35,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:35,653 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:35,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,857 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash -946966513, now seen corresponding path program 100 times [2021-05-03 13:50:35,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:35,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83648762] [2021-05-03 13:50:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:35,860 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814836468] [2021-05-03 13:50:35,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:35,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:35,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:35,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:35,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:35,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:35,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:35,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:50:36,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:36,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:36,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83648762] [2021-05-03 13:50:36,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:36,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814836468] [2021-05-03 13:50:36,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:36,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356960084] [2021-05-03 13:50:36,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:36,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:36,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:36,071 INFO L87 Difference]: Start difference. First operand 182 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:36,207 INFO L93 Difference]: Finished difference Result 200 states and 492 transitions. [2021-05-03 13:50:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:36,208 INFO L225 Difference]: With dead ends: 200 [2021-05-03 13:50:36,208 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 13:50:36,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 13:50:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2021-05-03 13:50:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5384615384615383) internal successors, (462), 182 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 462 transitions. [2021-05-03 13:50:36,210 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 462 transitions. Word has length 16 [2021-05-03 13:50:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:36,210 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 462 transitions. [2021-05-03 13:50:36,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 462 transitions. [2021-05-03 13:50:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:36,210 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:36,210 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:36,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 13:50:36,411 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 771377193, now seen corresponding path program 101 times [2021-05-03 13:50:36,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:36,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104690203] [2021-05-03 13:50:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:36,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:36,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312274975] [2021-05-03 13:50:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:36,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:36,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:36,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:36,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:36,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:36,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:36,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:36,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:36,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:36,566 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104690203] [2021-05-03 13:50:36,609 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312274975] [2021-05-03 13:50:36,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:36,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:36,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235848797] [2021-05-03 13:50:36,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:36,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:36,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:36,610 INFO L87 Difference]: Start difference. First operand 183 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:36,780 INFO L93 Difference]: Finished difference Result 209 states and 516 transitions. [2021-05-03 13:50:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:36,785 INFO L225 Difference]: With dead ends: 209 [2021-05-03 13:50:36,785 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 13:50:36,785 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 13:50:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 183. [2021-05-03 13:50:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5384615384615383) internal successors, (462), 182 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 462 transitions. [2021-05-03 13:50:36,789 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 462 transitions. Word has length 16 [2021-05-03 13:50:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:36,789 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 462 transitions. [2021-05-03 13:50:36,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 462 transitions. [2021-05-03 13:50:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:36,790 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:36,790 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:37,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-03 13:50:37,011 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:37,011 INFO L82 PathProgramCache]: Analyzing trace with hash -375511707, now seen corresponding path program 102 times [2021-05-03 13:50:37,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:37,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041602128] [2021-05-03 13:50:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:37,013 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:37,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747359515] [2021-05-03 13:50:37,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:37,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:37,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:37,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:37,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:37,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:37,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:37,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:37,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:37,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,205 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041602128] [2021-05-03 13:50:37,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:37,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747359515] [2021-05-03 13:50:37,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:37,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:37,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534768793] [2021-05-03 13:50:37,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:37,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:37,235 INFO L87 Difference]: Start difference. First operand 183 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:37,379 INFO L93 Difference]: Finished difference Result 197 states and 489 transitions. [2021-05-03 13:50:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:37,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:37,380 INFO L225 Difference]: With dead ends: 197 [2021-05-03 13:50:37,380 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 13:50:37,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:37,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 13:50:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-03 13:50:37,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5434782608695654) internal successors, (468), 184 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 468 transitions. [2021-05-03 13:50:37,383 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 468 transitions. Word has length 16 [2021-05-03 13:50:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:37,383 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 468 transitions. [2021-05-03 13:50:37,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 468 transitions. [2021-05-03 13:50:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:37,383 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:37,383 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:37,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,584 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:37,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1342831999, now seen corresponding path program 103 times [2021-05-03 13:50:37,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:37,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337877178] [2021-05-03 13:50:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:37,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:37,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586094913] [2021-05-03 13:50:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:37,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:37,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:50:37,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:37,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:37,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:37,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:37,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:37,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:37,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:37,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337877178] [2021-05-03 13:50:37,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586094913] [2021-05-03 13:50:37,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:37,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:37,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373733533] [2021-05-03 13:50:37,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:37,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:37,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:37,795 INFO L87 Difference]: Start difference. First operand 185 states and 468 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:37,959 INFO L93 Difference]: Finished difference Result 207 states and 514 transitions. [2021-05-03 13:50:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:37,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:37,959 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:50:37,960 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:50:37,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:50:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 184. [2021-05-03 13:50:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.540983606557377) internal successors, (465), 183 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) [2021-05-03 13:50:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 465 transitions. [2021-05-03 13:50:37,962 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 465 transitions. Word has length 16 [2021-05-03 13:50:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:37,962 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 465 transitions. [2021-05-03 13:50:37,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 465 transitions. [2021-05-03 13:50:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:37,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:37,963 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:38,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,163 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1361266025, now seen corresponding path program 104 times [2021-05-03 13:50:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:38,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921381617] [2021-05-03 13:50:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:38,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:38,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632914685] [2021-05-03 13:50:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:38,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:38,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:38,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:38,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:38,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:38,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:38,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:38,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:50:38,287 INFO L446 ElimStorePlain]: Different costs {0=[v_A_77], 5=[F]} [2021-05-03 13:50:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:38,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:38,311 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:38,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:38,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:38,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:38,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921381617] [2021-05-03 13:50:38,366 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:38,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632914685] [2021-05-03 13:50:38,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:38,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:38,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038563483] [2021-05-03 13:50:38,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:38,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:38,367 INFO L87 Difference]: Start difference. First operand 184 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:38,491 INFO L93 Difference]: Finished difference Result 200 states and 498 transitions. [2021-05-03 13:50:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:38,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:38,492 INFO L225 Difference]: With dead ends: 200 [2021-05-03 13:50:38,492 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 13:50:38,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 13:50:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-05-03 13:50:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.540983606557377) internal successors, (465), 183 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) [2021-05-03 13:50:38,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 465 transitions. [2021-05-03 13:50:38,495 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 465 transitions. Word has length 16 [2021-05-03 13:50:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:38,495 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 465 transitions. [2021-05-03 13:50:38,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,495 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 465 transitions. [2021-05-03 13:50:38,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:38,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:38,496 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:38,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-05-03 13:50:38,696 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash -191082135, now seen corresponding path program 105 times [2021-05-03 13:50:38,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:38,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318205493] [2021-05-03 13:50:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:38,698 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:38,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051828131] [2021-05-03 13:50:38,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:38,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:38,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:50:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318205493] [2021-05-03 13:50:38,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051828131] [2021-05-03 13:50:38,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:38,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418629521] [2021-05-03 13:50:38,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:38,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:38,815 INFO L87 Difference]: Start difference. First operand 184 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:38,961 INFO L93 Difference]: Finished difference Result 260 states and 627 transitions. [2021-05-03 13:50:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:38,962 INFO L225 Difference]: With dead ends: 260 [2021-05-03 13:50:38,962 INFO L226 Difference]: Without dead ends: 253 [2021-05-03 13:50:38,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:38,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-03 13:50:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 185. [2021-05-03 13:50:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.527173913043478) internal successors, (465), 184 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) [2021-05-03 13:50:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 465 transitions. [2021-05-03 13:50:38,964 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 465 transitions. Word has length 16 [2021-05-03 13:50:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:38,965 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 465 transitions. [2021-05-03 13:50:38,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 465 transitions. [2021-05-03 13:50:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:38,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:38,965 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:39,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,165 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1770659053, now seen corresponding path program 106 times [2021-05-03 13:50:39,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:39,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511842772] [2021-05-03 13:50:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:39,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:39,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778160394] [2021-05-03 13:50:39,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:39,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:39,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:39,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:39,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:39,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:39,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:39,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:39,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:39,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:39,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:39,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:39,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,358 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:39,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511842772] [2021-05-03 13:50:39,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:39,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778160394] [2021-05-03 13:50:39,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:39,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:39,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125568148] [2021-05-03 13:50:39,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:39,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:39,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:39,389 INFO L87 Difference]: Start difference. First operand 185 states and 465 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:39,584 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2021-05-03 13:50:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:39,585 INFO L225 Difference]: With dead ends: 210 [2021-05-03 13:50:39,585 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 13:50:39,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 13:50:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-03 13:50:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:50:39,588 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:50:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:39,588 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:50:39,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:50:39,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:39,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:39,588 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:39,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-03 13:50:39,789 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -805964537, now seen corresponding path program 107 times [2021-05-03 13:50:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:39,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069527595] [2021-05-03 13:50:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:39,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:39,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893495224] [2021-05-03 13:50:39,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:39,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:39,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:39,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:39,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:39,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:50:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:39,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:50:39,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:39,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:39,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:39,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:39,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:39,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:39,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:39,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069527595] [2021-05-03 13:50:39,992 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:39,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893495224] [2021-05-03 13:50:39,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:39,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:39,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289884622] [2021-05-03 13:50:39,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:39,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:39,993 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:40,192 INFO L93 Difference]: Finished difference Result 220 states and 540 transitions. [2021-05-03 13:50:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:40,193 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:50:40,193 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:50:40,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:50:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 187. [2021-05-03 13:50:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5376344086021505) internal successors, (472), 186 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 472 transitions. [2021-05-03 13:50:40,196 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 472 transitions. Word has length 16 [2021-05-03 13:50:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:40,196 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 472 transitions. [2021-05-03 13:50:40,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 472 transitions. [2021-05-03 13:50:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:40,196 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:40,196 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:40,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 13:50:40,405 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -787530511, now seen corresponding path program 108 times [2021-05-03 13:50:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:40,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645354089] [2021-05-03 13:50:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:40,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:40,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347318263] [2021-05-03 13:50:40,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:40,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:40,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:40,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:40,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:40,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:40,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:40,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:40,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:40,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:40,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:40,546 INFO L446 ElimStorePlain]: Different costs {0=[v_A_83], 5=[F]} [2021-05-03 13:50:40,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:40,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:40,571 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:40,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:40,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:40,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:40,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:40,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645354089] [2021-05-03 13:50:40,628 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:40,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347318263] [2021-05-03 13:50:40,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:40,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:40,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141934093] [2021-05-03 13:50:40,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:40,628 INFO L87 Difference]: Start difference. First operand 187 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:40,777 INFO L93 Difference]: Finished difference Result 207 states and 515 transitions. [2021-05-03 13:50:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:40,778 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:50:40,778 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:50:40,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:50:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-05-03 13:50:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-05-03 13:50:40,780 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-05-03 13:50:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:40,780 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-05-03 13:50:40,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-05-03 13:50:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:40,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:40,781 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:40,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 13:50:40,985 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash 528626793, now seen corresponding path program 109 times [2021-05-03 13:50:40,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:40,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647398633] [2021-05-03 13:50:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:40,987 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:40,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882858231] [2021-05-03 13:50:40,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:41,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:41,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:50:41,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:41,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:41,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:41,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:41,132 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:41,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:41,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647398633] [2021-05-03 13:50:41,198 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:41,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882858231] [2021-05-03 13:50:41,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:41,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:41,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526471371] [2021-05-03 13:50:41,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:41,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:41,199 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:41,331 INFO L93 Difference]: Finished difference Result 207 states and 516 transitions. [2021-05-03 13:50:41,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:41,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:41,332 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:50:41,332 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:50:41,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:50:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 186. [2021-05-03 13:50:41,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-05-03 13:50:41,334 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-05-03 13:50:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:41,334 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-05-03 13:50:41,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-05-03 13:50:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:41,334 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:41,334 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:41,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,549 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -417524123, now seen corresponding path program 110 times [2021-05-03 13:50:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701313931] [2021-05-03 13:50:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:41,551 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:41,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817186486] [2021-05-03 13:50:41,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:41,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:41,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:41,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:41,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:41,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:41,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:41,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:41,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:41,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:41,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:41,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:41,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:41,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701313931] [2021-05-03 13:50:41,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:41,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817186486] [2021-05-03 13:50:41,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:41,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920975691] [2021-05-03 13:50:41,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:41,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:41,740 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:41,899 INFO L93 Difference]: Finished difference Result 212 states and 518 transitions. [2021-05-03 13:50:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:41,900 INFO L225 Difference]: With dead ends: 212 [2021-05-03 13:50:41,900 INFO L226 Difference]: Without dead ends: 209 [2021-05-03 13:50:41,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-03 13:50:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 188. [2021-05-03 13:50:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:50:41,903 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:50:41,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:41,903 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:50:41,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,903 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:50:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:41,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:41,904 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:42,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-03 13:50:42,118 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:42,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:42,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1300819583, now seen corresponding path program 111 times [2021-05-03 13:50:42,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:42,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933396175] [2021-05-03 13:50:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:42,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:42,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532052772] [2021-05-03 13:50:42,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:42,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:42,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:42,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:42,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:42,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:42,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:42,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:42,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:42,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:42,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:42,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:42,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,297 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933396175] [2021-05-03 13:50:42,339 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532052772] [2021-05-03 13:50:42,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:42,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:42,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603232999] [2021-05-03 13:50:42,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:42,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:42,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:42,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:42,340 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:42,544 INFO L93 Difference]: Finished difference Result 222 states and 543 transitions. [2021-05-03 13:50:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:42,545 INFO L225 Difference]: With dead ends: 222 [2021-05-03 13:50:42,545 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 13:50:42,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 13:50:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 187. [2021-05-03 13:50:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.5376344086021505) internal successors, (472), 186 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 472 transitions. [2021-05-03 13:50:42,548 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 472 transitions. Word has length 16 [2021-05-03 13:50:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:42,548 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 472 transitions. [2021-05-03 13:50:42,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,548 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 472 transitions. [2021-05-03 13:50:42,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:42,548 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:42,548 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:42,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:42,749 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1319253609, now seen corresponding path program 112 times [2021-05-03 13:50:42,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:42,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678168559] [2021-05-03 13:50:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:42,751 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:42,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324246020] [2021-05-03 13:50:42,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:42,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:42,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:42,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:42,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:42,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:50:42,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:42,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:42,866 INFO L446 ElimStorePlain]: Different costs {0=[v_A_91], 5=[F]} [2021-05-03 13:50:42,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:42,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,889 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:42,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:42,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:42,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:42,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678168559] [2021-05-03 13:50:42,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324246020] [2021-05-03 13:50:42,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:42,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:42,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873286079] [2021-05-03 13:50:42,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:42,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:42,948 INFO L87 Difference]: Start difference. First operand 187 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:43,102 INFO L93 Difference]: Finished difference Result 209 states and 518 transitions. [2021-05-03 13:50:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:43,103 INFO L225 Difference]: With dead ends: 209 [2021-05-03 13:50:43,103 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 13:50:43,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 13:50:43,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2021-05-03 13:50:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.535135135135135) internal successors, (469), 185 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 469 transitions. [2021-05-03 13:50:43,105 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 469 transitions. Word has length 16 [2021-05-03 13:50:43,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:43,105 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 469 transitions. [2021-05-03 13:50:43,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,105 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 469 transitions. [2021-05-03 13:50:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:43,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:43,105 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:43,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:43,306 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:43,306 INFO L82 PathProgramCache]: Analyzing trace with hash 216824293, now seen corresponding path program 113 times [2021-05-03 13:50:43,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:43,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411307332] [2021-05-03 13:50:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:43,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:43,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606365643] [2021-05-03 13:50:43,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:50:43,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:50:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:43,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:50:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:43,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:43,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:50:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:43,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-05-03 13:50:43,471 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:50:43,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:43,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:43,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:16 [2021-05-03 13:50:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:43,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411307332] [2021-05-03 13:50:43,513 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:43,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606365643] [2021-05-03 13:50:43,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:43,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:43,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813620328] [2021-05-03 13:50:43,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:43,514 INFO L87 Difference]: Start difference. First operand 186 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:43,629 INFO L93 Difference]: Finished difference Result 208 states and 508 transitions. [2021-05-03 13:50:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:43,630 INFO L225 Difference]: With dead ends: 208 [2021-05-03 13:50:43,630 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 13:50:43,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 13:50:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2021-05-03 13:50:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.5355191256830603) internal successors, (464), 183 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 464 transitions. [2021-05-03 13:50:43,632 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 464 transitions. Word has length 16 [2021-05-03 13:50:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:43,632 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 464 transitions. [2021-05-03 13:50:43,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 464 transitions. [2021-05-03 13:50:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:43,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:43,633 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:43,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:43,833 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1659556383, now seen corresponding path program 114 times [2021-05-03 13:50:43,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:43,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111481551] [2021-05-03 13:50:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:43,836 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:43,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035268663] [2021-05-03 13:50:43,836 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 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 [2021-05-03 13:50:43,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:43,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:43,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:43,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:43,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:43,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:43,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:43,956 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:43,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:43,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:43,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:43,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111481551] [2021-05-03 13:50:44,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035268663] [2021-05-03 13:50:44,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:44,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250311046] [2021-05-03 13:50:44,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:44,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:44,035 INFO L87 Difference]: Start difference. First operand 184 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:44,217 INFO L93 Difference]: Finished difference Result 207 states and 514 transitions. [2021-05-03 13:50:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:44,218 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:50:44,218 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:50:44,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:50:44,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-05-03 13:50:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-05-03 13:50:44,220 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-05-03 13:50:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:44,220 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-05-03 13:50:44,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-05-03 13:50:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:44,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:44,220 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:44,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,421 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 486614377, now seen corresponding path program 115 times [2021-05-03 13:50:44,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:44,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330100882] [2021-05-03 13:50:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:44,423 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:44,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637752656] [2021-05-03 13:50:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:44,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:44,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:44,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:50:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:44,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:50:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:44,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:50:44,541 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:44,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:44,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:44,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330100882] [2021-05-03 13:50:44,606 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:44,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637752656] [2021-05-03 13:50:44,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:44,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423819232] [2021-05-03 13:50:44,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:44,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:44,607 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:44,745 INFO L93 Difference]: Finished difference Result 207 states and 511 transitions. [2021-05-03 13:50:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:44,746 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:50:44,746 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:50:44,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:50:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-05-03 13:50:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-05-03 13:50:44,748 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-05-03 13:50:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:44,748 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-05-03 13:50:44,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-05-03 13:50:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:44,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:44,748 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:44,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 13:50:44,949 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash 25375017, now seen corresponding path program 116 times [2021-05-03 13:50:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628141978] [2021-05-03 13:50:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:44,951 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:44,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474102940] [2021-05-03 13:50:44,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:44,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:44,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:44,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:44,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:44,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:50:45,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:45,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:50:45,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:45,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:45,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:45,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:45,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:45,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628141978] [2021-05-03 13:50:45,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:45,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474102940] [2021-05-03 13:50:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:45,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222410180] [2021-05-03 13:50:45,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:45,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:45,148 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:45,297 INFO L93 Difference]: Finished difference Result 209 states and 510 transitions. [2021-05-03 13:50:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:45,298 INFO L225 Difference]: With dead ends: 209 [2021-05-03 13:50:45,298 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 13:50:45,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 13:50:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-05-03 13:50:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.543010752688172) internal successors, (473), 186 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 473 transitions. [2021-05-03 13:50:45,301 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 473 transitions. Word has length 16 [2021-05-03 13:50:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:45,302 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 473 transitions. [2021-05-03 13:50:45,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 473 transitions. [2021-05-03 13:50:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:45,302 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:45,302 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:45,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 13:50:45,524 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1743718723, now seen corresponding path program 117 times [2021-05-03 13:50:45,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:45,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851229621] [2021-05-03 13:50:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:45,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:45,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149809043] [2021-05-03 13:50:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:45,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:45,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:45,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:45,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:45,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:45,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:45,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:45,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:45,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:45,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851229621] [2021-05-03 13:50:45,741 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149809043] [2021-05-03 13:50:45,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:45,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:45,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691411783] [2021-05-03 13:50:45,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:45,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:45,742 INFO L87 Difference]: Start difference. First operand 187 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:45,903 INFO L93 Difference]: Finished difference Result 219 states and 535 transitions. [2021-05-03 13:50:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:45,904 INFO L225 Difference]: With dead ends: 219 [2021-05-03 13:50:45,904 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 13:50:45,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 13:50:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 186. [2021-05-03 13:50:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.5405405405405403) internal successors, (470), 185 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 470 transitions. [2021-05-03 13:50:45,907 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 470 transitions. Word has length 16 [2021-05-03 13:50:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:45,907 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 470 transitions. [2021-05-03 13:50:45,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 470 transitions. [2021-05-03 13:50:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:45,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:45,907 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:46,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 13:50:46,108 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1762152749, now seen corresponding path program 118 times [2021-05-03 13:50:46,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:46,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435343695] [2021-05-03 13:50:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:46,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:46,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410440207] [2021-05-03 13:50:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:46,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:46,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:46,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:46,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:50:46,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:46,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:46,222 INFO L446 ElimStorePlain]: Different costs {0=[v_A_104], 5=[F]} [2021-05-03 13:50:46,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:46,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,245 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:46,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:46,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,251 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:46,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435343695] [2021-05-03 13:50:46,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:46,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410440207] [2021-05-03 13:50:46,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:46,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:46,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126818184] [2021-05-03 13:50:46,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:46,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:46,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:46,298 INFO L87 Difference]: Start difference. First operand 186 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:46,463 INFO L93 Difference]: Finished difference Result 213 states and 523 transitions. [2021-05-03 13:50:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:46,464 INFO L225 Difference]: With dead ends: 213 [2021-05-03 13:50:46,464 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 13:50:46,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 13:50:46,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 185. [2021-05-03 13:50:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5380434782608696) internal successors, (467), 184 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 467 transitions. [2021-05-03 13:50:46,466 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 467 transitions. Word has length 16 [2021-05-03 13:50:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:46,466 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 467 transitions. [2021-05-03 13:50:46,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 467 transitions. [2021-05-03 13:50:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:46,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:46,467 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:46,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 13:50:46,667 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:46,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1216657243, now seen corresponding path program 119 times [2021-05-03 13:50:46,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:46,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847287722] [2021-05-03 13:50:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:46,669 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:46,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752191171] [2021-05-03 13:50:46,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:46,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:46,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:46,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:46,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:46,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:46,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:50:46,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:46,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:50:46,804 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:46,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:46,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:46,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:46,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:46,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847287722] [2021-05-03 13:50:46,868 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:46,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752191171] [2021-05-03 13:50:46,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:46,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:46,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292096983] [2021-05-03 13:50:46,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:46,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:46,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:46,869 INFO L87 Difference]: Start difference. First operand 185 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:47,054 INFO L93 Difference]: Finished difference Result 216 states and 532 transitions. [2021-05-03 13:50:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:47,055 INFO L225 Difference]: With dead ends: 216 [2021-05-03 13:50:47,055 INFO L226 Difference]: Without dead ends: 213 [2021-05-03 13:50:47,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-03 13:50:47,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 184. [2021-05-03 13:50:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.530054644808743) internal successors, (463), 183 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 463 transitions. [2021-05-03 13:50:47,057 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 463 transitions. Word has length 16 [2021-05-03 13:50:47,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:47,057 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 463 transitions. [2021-05-03 13:50:47,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,057 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 463 transitions. [2021-05-03 13:50:47,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:47,057 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:47,057 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:47,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,261 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash 929513517, now seen corresponding path program 120 times [2021-05-03 13:50:47,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:47,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736746774] [2021-05-03 13:50:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:47,264 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:47,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032793893] [2021-05-03 13:50:47,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:47,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:47,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:47,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:47,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:47,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:47,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:50:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:47,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:50:47,385 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:47,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:47,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:47,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:47,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736746774] [2021-05-03 13:50:47,450 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:47,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032793893] [2021-05-03 13:50:47,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:47,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:47,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526955237] [2021-05-03 13:50:47,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:47,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:47,451 INFO L87 Difference]: Start difference. First operand 184 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:47,644 INFO L93 Difference]: Finished difference Result 219 states and 538 transitions. [2021-05-03 13:50:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:47,645 INFO L225 Difference]: With dead ends: 219 [2021-05-03 13:50:47,645 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 13:50:47,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 13:50:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 183. [2021-05-03 13:50:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5274725274725274) internal successors, (460), 182 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 460 transitions. [2021-05-03 13:50:47,647 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 460 transitions. Word has length 16 [2021-05-03 13:50:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:47,647 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 460 transitions. [2021-05-03 13:50:47,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 460 transitions. [2021-05-03 13:50:47,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:47,647 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:47,647 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:47,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 13:50:47,857 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:47,857 INFO L82 PathProgramCache]: Analyzing trace with hash -164578071, now seen corresponding path program 121 times [2021-05-03 13:50:47,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:47,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685515184] [2021-05-03 13:50:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:47,859 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:47,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303641467] [2021-05-03 13:50:47,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:47,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:47,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:47,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:50:47,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:47,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:50:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:47,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:50:47,979 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:47,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:47,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:47,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:47,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:47,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685515184] [2021-05-03 13:50:48,047 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:48,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303641467] [2021-05-03 13:50:48,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:48,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:48,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396132954] [2021-05-03 13:50:48,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:48,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:48,048 INFO L87 Difference]: Start difference. First operand 183 states and 460 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:48,215 INFO L93 Difference]: Finished difference Result 233 states and 574 transitions. [2021-05-03 13:50:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:48,216 INFO L225 Difference]: With dead ends: 233 [2021-05-03 13:50:48,216 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 13:50:48,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 13:50:48,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2021-05-03 13:50:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.522222222222222) internal successors, (454), 180 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 454 transitions. [2021-05-03 13:50:48,218 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 454 transitions. Word has length 16 [2021-05-03 13:50:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:48,218 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 454 transitions. [2021-05-03 13:50:48,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 454 transitions. [2021-05-03 13:50:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:48,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:48,219 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:48,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-03 13:50:48,419 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -933648953, now seen corresponding path program 122 times [2021-05-03 13:50:48,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:48,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2322431] [2021-05-03 13:50:48,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:48,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:48,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931719500] [2021-05-03 13:50:48,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:48,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:48,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:48,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:48,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:48,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:48,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:48,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:48,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:48,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:48,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:48,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:48,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2322431] [2021-05-03 13:50:48,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:48,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931719500] [2021-05-03 13:50:48,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:48,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:48,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907414703] [2021-05-03 13:50:48,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:48,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:48,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:48,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:48,617 INFO L87 Difference]: Start difference. First operand 181 states and 454 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:48,782 INFO L93 Difference]: Finished difference Result 272 states and 668 transitions. [2021-05-03 13:50:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:48,783 INFO L225 Difference]: With dead ends: 272 [2021-05-03 13:50:48,783 INFO L226 Difference]: Without dead ends: 265 [2021-05-03 13:50:48,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-03 13:50:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 183. [2021-05-03 13:50:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.521978021978022) internal successors, (459), 182 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 459 transitions. [2021-05-03 13:50:48,785 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 459 transitions. Word has length 16 [2021-05-03 13:50:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:48,785 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 459 transitions. [2021-05-03 13:50:48,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 459 transitions. [2021-05-03 13:50:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:48,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:48,786 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:48,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,986 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash -362194147, now seen corresponding path program 123 times [2021-05-03 13:50:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625501850] [2021-05-03 13:50:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:48,988 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:48,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326700569] [2021-05-03 13:50:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:49,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:49,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:49,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:49,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:49,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:49,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:49,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:49,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:49,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625501850] [2021-05-03 13:50:49,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326700569] [2021-05-03 13:50:49,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67815714] [2021-05-03 13:50:49,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:49,170 INFO L87 Difference]: Start difference. First operand 183 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:49,331 INFO L93 Difference]: Finished difference Result 274 states and 674 transitions. [2021-05-03 13:50:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:49,332 INFO L225 Difference]: With dead ends: 274 [2021-05-03 13:50:49,332 INFO L226 Difference]: Without dead ends: 268 [2021-05-03 13:50:49,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:49,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-03 13:50:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 184. [2021-05-03 13:50:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.519125683060109) internal successors, (461), 183 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 461 transitions. [2021-05-03 13:50:49,334 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 461 transitions. Word has length 16 [2021-05-03 13:50:49,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:49,334 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 461 transitions. [2021-05-03 13:50:49,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 461 transitions. [2021-05-03 13:50:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:49,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:49,335 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:49,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,535 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:49,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1366853187, now seen corresponding path program 124 times [2021-05-03 13:50:49,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:49,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857970166] [2021-05-03 13:50:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:49,538 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471742994] [2021-05-03 13:50:49,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:49,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:49,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:49,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:49,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:49,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:49,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:50:49,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:49,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:49,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:49,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:49,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:49,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857970166] [2021-05-03 13:50:49,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:49,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471742994] [2021-05-03 13:50:49,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:49,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:49,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839832291] [2021-05-03 13:50:49,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:49,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:49,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:49,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:49,745 INFO L87 Difference]: Start difference. First operand 184 states and 461 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:49,897 INFO L93 Difference]: Finished difference Result 279 states and 688 transitions. [2021-05-03 13:50:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:49,898 INFO L225 Difference]: With dead ends: 279 [2021-05-03 13:50:49,898 INFO L226 Difference]: Without dead ends: 274 [2021-05-03 13:50:49,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-03 13:50:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 185. [2021-05-03 13:50:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2021-05-03 13:50:49,901 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2021-05-03 13:50:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:49,901 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2021-05-03 13:50:49,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2021-05-03 13:50:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:49,902 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:49,902 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:50,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,105 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1209770403, now seen corresponding path program 125 times [2021-05-03 13:50:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:50,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362166830] [2021-05-03 13:50:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:50,107 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:50,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946863511] [2021-05-03 13:50:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:50,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:50,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:50,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:50,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:50,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:50,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:50,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:50,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:50,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362166830] [2021-05-03 13:50:50,306 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946863511] [2021-05-03 13:50:50,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:50,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:50,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980281214] [2021-05-03 13:50:50,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:50,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:50,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:50,308 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:50,485 INFO L93 Difference]: Finished difference Result 287 states and 710 transitions. [2021-05-03 13:50:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:50,485 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:50,486 INFO L225 Difference]: With dead ends: 287 [2021-05-03 13:50:50,486 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 13:50:50,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 13:50:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 185. [2021-05-03 13:50:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.516304347826087) internal successors, (463), 184 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 463 transitions. [2021-05-03 13:50:50,490 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 463 transitions. Word has length 16 [2021-05-03 13:50:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:50,490 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 463 transitions. [2021-05-03 13:50:50,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 463 transitions. [2021-05-03 13:50:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:50,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:50,491 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:50,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,693 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1246121035, now seen corresponding path program 126 times [2021-05-03 13:50:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:50,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743066389] [2021-05-03 13:50:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:50,695 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:50,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107963591] [2021-05-03 13:50:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:50,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:50,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:50,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:50,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:50,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:50,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:50,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:50,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:50,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:50:50,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:50,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:50,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:50,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:50,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:50,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743066389] [2021-05-03 13:50:50,883 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:50,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107963591] [2021-05-03 13:50:50,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:50,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:50,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185779841] [2021-05-03 13:50:50,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:50,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:50,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:50,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:50,884 INFO L87 Difference]: Start difference. First operand 185 states and 463 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:51,030 INFO L93 Difference]: Finished difference Result 223 states and 557 transitions. [2021-05-03 13:50:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:51,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:51,030 INFO L225 Difference]: With dead ends: 223 [2021-05-03 13:50:51,031 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 13:50:51,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 13:50:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 187. [2021-05-03 13:50:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-05-03 13:50:51,033 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-05-03 13:50:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:51,033 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-05-03 13:50:51,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-05-03 13:50:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:51,034 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:51,034 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:51,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 13:50:51,255 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:51,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:51,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1319798927, now seen corresponding path program 127 times [2021-05-03 13:50:51,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:51,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758688003] [2021-05-03 13:50:51,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:51,257 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:51,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815179450] [2021-05-03 13:50:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:51,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:51,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:51,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:51,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:51,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:51,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:51,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:51,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:51,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758688003] [2021-05-03 13:50:51,467 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:51,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815179450] [2021-05-03 13:50:51,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:51,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:51,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579617407] [2021-05-03 13:50:51,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:51,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:51,468 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:51,662 INFO L93 Difference]: Finished difference Result 230 states and 574 transitions. [2021-05-03 13:50:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:51,663 INFO L225 Difference]: With dead ends: 230 [2021-05-03 13:50:51,663 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 13:50:51,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 13:50:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 188. [2021-05-03 13:50:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-05-03 13:50:51,666 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-05-03 13:50:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:51,666 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-05-03 13:50:51,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-05-03 13:50:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:51,667 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:51,667 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:51,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:51,877 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 398544779, now seen corresponding path program 128 times [2021-05-03 13:50:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:51,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924440229] [2021-05-03 13:50:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:51,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468746719] [2021-05-03 13:50:51,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:51,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:51,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:51,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:51,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:51,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:51,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:51,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:51,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:51,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:51,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:51,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:52,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:52,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:52,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:52,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924440229] [2021-05-03 13:50:52,064 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:52,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468746719] [2021-05-03 13:50:52,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:52,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:52,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320335997] [2021-05-03 13:50:52,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:52,065 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:52,247 INFO L93 Difference]: Finished difference Result 239 states and 598 transitions. [2021-05-03 13:50:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:52,248 INFO L225 Difference]: With dead ends: 239 [2021-05-03 13:50:52,248 INFO L226 Difference]: Without dead ends: 236 [2021-05-03 13:50:52,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-03 13:50:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 186. [2021-05-03 13:50:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.518918918918919) internal successors, (466), 185 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 466 transitions. [2021-05-03 13:50:52,250 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 466 transitions. Word has length 16 [2021-05-03 13:50:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:52,250 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 466 transitions. [2021-05-03 13:50:52,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 466 transitions. [2021-05-03 13:50:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:52,251 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:52,251 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:52,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 13:50:52,451 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash -748344121, now seen corresponding path program 129 times [2021-05-03 13:50:52,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:52,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226121813] [2021-05-03 13:50:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:52,453 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:52,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136930246] [2021-05-03 13:50:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:52,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:52,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:52,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:52,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:52,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:52,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:52,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:52,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:52,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:52,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:52,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:52,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:52,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:52,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226121813] [2021-05-03 13:50:52,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:52,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136930246] [2021-05-03 13:50:52,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:52,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:52,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613476101] [2021-05-03 13:50:52,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:52,643 INFO L87 Difference]: Start difference. First operand 186 states and 466 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:52,804 INFO L93 Difference]: Finished difference Result 225 states and 565 transitions. [2021-05-03 13:50:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:52,804 INFO L225 Difference]: With dead ends: 225 [2021-05-03 13:50:52,804 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 13:50:52,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 13:50:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 188. [2021-05-03 13:50:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-05-03 13:50:52,807 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-05-03 13:50:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:52,807 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-05-03 13:50:52,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-05-03 13:50:52,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:52,807 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:52,807 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:53,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 13:50:53,008 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:53,008 INFO L82 PathProgramCache]: Analyzing trace with hash 969999585, now seen corresponding path program 130 times [2021-05-03 13:50:53,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:53,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840967838] [2021-05-03 13:50:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:53,009 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:53,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243687467] [2021-05-03 13:50:53,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:53,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:53,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:53,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:53,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:53,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:53,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:53,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:53,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:53,147 INFO L446 ElimStorePlain]: Different costs {0=[v_A_128], 5=[F]} [2021-05-03 13:50:53,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:53,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:50:53,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 13:50:53,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 13:50:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-05-03 13:50:53,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:29 [2021-05-03 13:50:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840967838] [2021-05-03 13:50:53,209 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:53,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243687467] [2021-05-03 13:50:53,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:53,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:53,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126216993] [2021-05-03 13:50:53,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:53,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:53,210 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:53,394 INFO L93 Difference]: Finished difference Result 235 states and 590 transitions. [2021-05-03 13:50:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:53,395 INFO L225 Difference]: With dead ends: 235 [2021-05-03 13:50:53,395 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 13:50:53,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 13:50:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 187. [2021-05-03 13:50:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-05-03 13:50:53,398 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-05-03 13:50:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:53,398 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-05-03 13:50:53,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-05-03 13:50:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:53,398 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:53,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:53,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-03 13:50:53,599 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:53,599 INFO L82 PathProgramCache]: Analyzing trace with hash 988433611, now seen corresponding path program 131 times [2021-05-03 13:50:53,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:53,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271501889] [2021-05-03 13:50:53,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:53,600 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:53,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725073370] [2021-05-03 13:50:53,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:53,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:53,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:53,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:53,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:53,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:53,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2021-05-03 13:50:53,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:53,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:53,722 INFO L446 ElimStorePlain]: Different costs {0=[v_A_130], 5=[F]} [2021-05-03 13:50:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:53,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,746 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:53,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:53,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:53,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:53,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271501889] [2021-05-03 13:50:53,800 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:53,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725073370] [2021-05-03 13:50:53,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:53,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:53,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578065766] [2021-05-03 13:50:53,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:53,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:53,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:53,801 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:53,952 INFO L93 Difference]: Finished difference Result 228 states and 574 transitions. [2021-05-03 13:50:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:53,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:53,953 INFO L225 Difference]: With dead ends: 228 [2021-05-03 13:50:53,953 INFO L226 Difference]: Without dead ends: 225 [2021-05-03 13:50:53,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:53,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-03 13:50:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 187. [2021-05-03 13:50:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-05-03 13:50:53,955 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-05-03 13:50:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:53,955 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-05-03 13:50:53,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:53,956 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-05-03 13:50:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:53,956 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:53,956 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:54,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,156 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2036153729, now seen corresponding path program 132 times [2021-05-03 13:50:54,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:54,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276370570] [2021-05-03 13:50:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:54,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:54,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665572277] [2021-05-03 13:50:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:54,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:54,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:54,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:54,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:54,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:54,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:54,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:54,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:54,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,329 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276370570] [2021-05-03 13:50:54,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:54,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665572277] [2021-05-03 13:50:54,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:54,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:54,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831848549] [2021-05-03 13:50:54,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:54,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:54,353 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:54,487 INFO L93 Difference]: Finished difference Result 213 states and 529 transitions. [2021-05-03 13:50:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:54,488 INFO L225 Difference]: With dead ends: 213 [2021-05-03 13:50:54,488 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 13:50:54,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 13:50:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2021-05-03 13:50:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.526595744680851) internal successors, (475), 188 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 475 transitions. [2021-05-03 13:50:54,490 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 475 transitions. Word has length 16 [2021-05-03 13:50:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:54,491 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 475 transitions. [2021-05-03 13:50:54,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 475 transitions. [2021-05-03 13:50:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:54,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:54,491 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:54,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-03 13:50:54,692 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:54,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:54,692 INFO L82 PathProgramCache]: Analyzing trace with hash -307106395, now seen corresponding path program 133 times [2021-05-03 13:50:54,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:54,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22556369] [2021-05-03 13:50:54,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:54,695 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:54,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267539940] [2021-05-03 13:50:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:54,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:54,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:54,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:54,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:54,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:54,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:54,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:50:54,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:54,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:54,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:54,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:54,864 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22556369] [2021-05-03 13:50:54,887 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267539940] [2021-05-03 13:50:54,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:54,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:54,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144106647] [2021-05-03 13:50:54,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:54,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:54,888 INFO L87 Difference]: Start difference. First operand 189 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:55,048 INFO L93 Difference]: Finished difference Result 220 states and 546 transitions. [2021-05-03 13:50:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:55,049 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:50:55,049 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:50:55,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:50:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 190. [2021-05-03 13:50:55,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5291005291005293) internal successors, (478), 189 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2021-05-03 13:50:55,051 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 16 [2021-05-03 13:50:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:55,051 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2021-05-03 13:50:55,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,051 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2021-05-03 13:50:55,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:55,051 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:55,051 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:55,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,252 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1411237311, now seen corresponding path program 134 times [2021-05-03 13:50:55,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:55,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934649201] [2021-05-03 13:50:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:55,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:55,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282987261] [2021-05-03 13:50:55,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:55,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:55,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:55,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:55,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:50:55,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:55,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:55,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934649201] [2021-05-03 13:50:55,458 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:55,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282987261] [2021-05-03 13:50:55,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:55,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:55,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317811588] [2021-05-03 13:50:55,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:55,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:55,459 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:55,636 INFO L93 Difference]: Finished difference Result 229 states and 570 transitions. [2021-05-03 13:50:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:55,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:55,637 INFO L225 Difference]: With dead ends: 229 [2021-05-03 13:50:55,637 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 13:50:55,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 13:50:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 188. [2021-05-03 13:50:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5240641711229945) internal successors, (472), 187 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 472 transitions. [2021-05-03 13:50:55,639 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 472 transitions. Word has length 16 [2021-05-03 13:50:55,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:55,639 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 472 transitions. [2021-05-03 13:50:55,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 472 transitions. [2021-05-03 13:50:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:55,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:55,640 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:55,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,845 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 264348411, now seen corresponding path program 135 times [2021-05-03 13:50:55,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:55,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052812219] [2021-05-03 13:50:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:55,847 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:55,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628316553] [2021-05-03 13:50:55,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:55,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:55,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:55,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:55,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:55,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:55,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:55,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:55,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:55,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:55,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:55,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:56,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:56,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:56,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052812219] [2021-05-03 13:50:56,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:56,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628316553] [2021-05-03 13:50:56,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:56,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:56,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680709567] [2021-05-03 13:50:56,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:56,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:56,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:56,047 INFO L87 Difference]: Start difference. First operand 188 states and 472 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:56,203 INFO L93 Difference]: Finished difference Result 215 states and 537 transitions. [2021-05-03 13:50:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:56,204 INFO L225 Difference]: With dead ends: 215 [2021-05-03 13:50:56,204 INFO L226 Difference]: Without dead ends: 212 [2021-05-03 13:50:56,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-03 13:50:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2021-05-03 13:50:56,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.5291005291005293) internal successors, (478), 189 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 478 transitions. [2021-05-03 13:50:56,206 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 478 transitions. Word has length 16 [2021-05-03 13:50:56,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:56,206 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 478 transitions. [2021-05-03 13:50:56,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 478 transitions. [2021-05-03 13:50:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:56,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:56,207 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:56,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,407 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:56,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:56,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1982692117, now seen corresponding path program 136 times [2021-05-03 13:50:56,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:56,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667863118] [2021-05-03 13:50:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:56,409 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:56,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106608821] [2021-05-03 13:50:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:56,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:56,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:56,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:56,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:56,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:56,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:56,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:50:56,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:56,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:56,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:56,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:56,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667863118] [2021-05-03 13:50:56,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:56,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106608821] [2021-05-03 13:50:56,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:56,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:56,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143410087] [2021-05-03 13:50:56,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:56,599 INFO L87 Difference]: Start difference. First operand 190 states and 478 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:56,766 INFO L93 Difference]: Finished difference Result 225 states and 562 transitions. [2021-05-03 13:50:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:56,767 INFO L225 Difference]: With dead ends: 225 [2021-05-03 13:50:56,767 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 13:50:56,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 13:50:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2021-05-03 13:50:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.526595744680851) internal successors, (475), 188 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 475 transitions. [2021-05-03 13:50:56,769 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 475 transitions. Word has length 16 [2021-05-03 13:50:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:56,769 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 475 transitions. [2021-05-03 13:50:56,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 475 transitions. [2021-05-03 13:50:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:56,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:56,770 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:56,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,970 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:56,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2001126143, now seen corresponding path program 137 times [2021-05-03 13:50:56,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:56,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532988092] [2021-05-03 13:50:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:56,972 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:56,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23911220] [2021-05-03 13:50:56,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:56,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:57,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:57,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:57,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:57,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:57,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:57,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:50:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:57,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:57,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:50:57,095 INFO L446 ElimStorePlain]: Different costs {0=[v_A_142], 5=[F]} [2021-05-03 13:50:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:57,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:57,119 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:57,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:57,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:57,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:57,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:57,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532988092] [2021-05-03 13:50:57,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:57,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23911220] [2021-05-03 13:50:57,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:57,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:57,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731276518] [2021-05-03 13:50:57,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:57,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:57,178 INFO L87 Difference]: Start difference. First operand 189 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:57,333 INFO L93 Difference]: Finished difference Result 218 states and 546 transitions. [2021-05-03 13:50:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:57,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:57,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:57,334 INFO L225 Difference]: With dead ends: 218 [2021-05-03 13:50:57,334 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 13:50:57,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 13:50:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 187. [2021-05-03 13:50:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.521505376344086) internal successors, (469), 186 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 469 transitions. [2021-05-03 13:50:57,337 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 469 transitions. Word has length 16 [2021-05-03 13:50:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:57,337 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 469 transitions. [2021-05-03 13:50:57,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 469 transitions. [2021-05-03 13:50:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:57,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:57,337 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:57,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,538 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1662061529, now seen corresponding path program 138 times [2021-05-03 13:50:57,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:57,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139175699] [2021-05-03 13:50:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:57,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:57,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846212066] [2021-05-03 13:50:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:50:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:57,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:57,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139175699] [2021-05-03 13:50:57,653 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:57,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846212066] [2021-05-03 13:50:57,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:57,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:57,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776303864] [2021-05-03 13:50:57,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:57,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:57,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:57,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:57,654 INFO L87 Difference]: Start difference. First operand 187 states and 469 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:57,821 INFO L93 Difference]: Finished difference Result 252 states and 626 transitions. [2021-05-03 13:50:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:57,822 INFO L225 Difference]: With dead ends: 252 [2021-05-03 13:50:57,822 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 13:50:57,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 13:50:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2021-05-03 13:50:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.5243243243243243) internal successors, (467), 185 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 467 transitions. [2021-05-03 13:50:57,825 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 467 transitions. Word has length 16 [2021-05-03 13:50:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:57,825 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 467 transitions. [2021-05-03 13:50:57,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,825 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 467 transitions. [2021-05-03 13:50:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:57,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:57,825 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:58,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 13:50:58,026 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1884448125, now seen corresponding path program 139 times [2021-05-03 13:50:58,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:58,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924649405] [2021-05-03 13:50:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:58,027 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:58,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162366235] [2021-05-03 13:50:58,027 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 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 [2021-05-03 13:50:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:58,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:58,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:58,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:58,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:58,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:58,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-05-03 13:50:58,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:58,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:58,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:58,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:50:58,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924649405] [2021-05-03 13:50:58,243 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:58,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162366235] [2021-05-03 13:50:58,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:58,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:58,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096374984] [2021-05-03 13:50:58,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:58,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:58,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:58,244 INFO L87 Difference]: Start difference. First operand 186 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:58,410 INFO L93 Difference]: Finished difference Result 223 states and 555 transitions. [2021-05-03 13:50:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:58,410 INFO L225 Difference]: With dead ends: 223 [2021-05-03 13:50:58,410 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 13:50:58,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 13:50:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 188. [2021-05-03 13:50:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:50:58,413 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:50:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:58,413 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:50:58,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:50:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:58,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:58,413 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:58,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-03 13:50:58,614 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:58,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash -166104419, now seen corresponding path program 140 times [2021-05-03 13:50:58,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:58,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888842757] [2021-05-03 13:50:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:58,615 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:58,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304033511] [2021-05-03 13:50:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:58,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:58,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:58,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:50:58,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:58,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:50:58,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:50:58,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:50:58,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:58,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:58,775 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:50:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:58,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888842757] [2021-05-03 13:50:58,822 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:58,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304033511] [2021-05-03 13:50:58,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:58,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:58,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678223811] [2021-05-03 13:50:58,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:58,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:58,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:58,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:58,823 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:58,992 INFO L93 Difference]: Finished difference Result 233 states and 580 transitions. [2021-05-03 13:50:58,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:58,993 INFO L225 Difference]: With dead ends: 233 [2021-05-03 13:50:58,993 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 13:50:58,993 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 13:50:58,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-05-03 13:50:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:50:58,995 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:50:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:58,995 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:50:58,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:50:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:58,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:58,996 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:59,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 13:50:59,196 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash -147670393, now seen corresponding path program 141 times [2021-05-03 13:50:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:59,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559780665] [2021-05-03 13:50:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:59,198 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:59,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704523797] [2021-05-03 13:50:59,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:59,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:50:59,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2021-05-03 13:50:59,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:50:59,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:50:59,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:50:59,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:50:59,315 INFO L446 ElimStorePlain]: Different costs {0=[v_A_148], 5=[F]} [2021-05-03 13:50:59,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:59,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,337 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:59,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:50:59,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:50:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559780665] [2021-05-03 13:50:59,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704523797] [2021-05-03 13:50:59,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:59,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:59,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045549055] [2021-05-03 13:50:59,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:59,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:59,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:59,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:59,395 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:59,527 INFO L93 Difference]: Finished difference Result 221 states and 556 transitions. [2021-05-03 13:50:59,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:50:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:59,527 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:50:59,527 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:50:59,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:50:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-05-03 13:50:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:50:59,530 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:50:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:59,530 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:50:59,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:50:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:50:59,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:59,531 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:59,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 13:50:59,752 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1168486911, now seen corresponding path program 142 times [2021-05-03 13:50:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:59,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648674031] [2021-05-03 13:50:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:59,754 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:50:59,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119126191] [2021-05-03 13:50:59,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:59,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:59,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:50:59,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:59,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:50:59,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2021-05-03 13:50:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:50:59,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:59,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:50:59,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:50:59,883 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:50:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:50:59,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:50:59,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:50:59,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:50:59,899 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:50:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:59,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648674031] [2021-05-03 13:50:59,947 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:50:59,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119126191] [2021-05-03 13:50:59,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:50:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:50:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481865454] [2021-05-03 13:50:59,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:59,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:59,947 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:00,088 INFO L93 Difference]: Finished difference Result 221 states and 556 transitions. [2021-05-03 13:51:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:00,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:00,089 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:51:00,089 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:51:00,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:51:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-05-03 13:51:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.5401069518716577) internal successors, (475), 187 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 475 transitions. [2021-05-03 13:51:00,091 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 475 transitions. Word has length 16 [2021-05-03 13:51:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:00,092 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 475 transitions. [2021-05-03 13:51:00,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 475 transitions. [2021-05-03 13:51:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:00,092 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:00,092 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:00,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,292 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1050402431, now seen corresponding path program 143 times [2021-05-03 13:51:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:00,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718033946] [2021-05-03 13:51:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:00,294 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:00,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282013847] [2021-05-03 13:51:00,294 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 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 [2021-05-03 13:51:00,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:00,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 13:51:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718033946] [2021-05-03 13:51:00,413 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282013847] [2021-05-03 13:51:00,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:00,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:00,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823409454] [2021-05-03 13:51:00,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:00,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:00,413 INFO L87 Difference]: Start difference. First operand 188 states and 475 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:00,596 INFO L93 Difference]: Finished difference Result 231 states and 575 transitions. [2021-05-03 13:51:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:00,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:00,597 INFO L225 Difference]: With dead ends: 231 [2021-05-03 13:51:00,597 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 13:51:00,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 13:51:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2021-05-03 13:51:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.532258064516129) internal successors, (471), 186 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 471 transitions. [2021-05-03 13:51:00,599 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 471 transitions. Word has length 16 [2021-05-03 13:51:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:00,599 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 471 transitions. [2021-05-03 13:51:00,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 471 transitions. [2021-05-03 13:51:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:00,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:00,599 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:00,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-03 13:51:00,800 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash -707456309, now seen corresponding path program 144 times [2021-05-03 13:51:00,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:00,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624089380] [2021-05-03 13:51:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:00,801 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:00,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678784750] [2021-05-03 13:51:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:00,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:00,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:00,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:00,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:00,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:00,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:00,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:00,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:00,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:51:00,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:00,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:00,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:00,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:00,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:00,981 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624089380] [2021-05-03 13:51:01,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678784750] [2021-05-03 13:51:01,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:01,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:01,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762868480] [2021-05-03 13:51:01,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:01,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:01,005 INFO L87 Difference]: Start difference. First operand 187 states and 471 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:01,135 INFO L93 Difference]: Finished difference Result 207 states and 517 transitions. [2021-05-03 13:51:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:01,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:01,136 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:51:01,136 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:51:01,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:51:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 189. [2021-05-03 13:51:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-05-03 13:51:01,138 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-05-03 13:51:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:01,138 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-05-03 13:51:01,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-05-03 13:51:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:01,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:01,138 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:01,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:01,339 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:01,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1021591025, now seen corresponding path program 145 times [2021-05-03 13:51:01,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:01,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426220027] [2021-05-03 13:51:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:01,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:01,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538448574] [2021-05-03 13:51:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:01,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:01,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:01,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:01,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:01,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:01,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:01,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:51:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:01,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:01,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426220027] [2021-05-03 13:51:01,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:01,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538448574] [2021-05-03 13:51:01,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:01,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562703283] [2021-05-03 13:51:01,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:01,532 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:01,696 INFO L93 Difference]: Finished difference Result 226 states and 563 transitions. [2021-05-03 13:51:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:01,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:01,697 INFO L225 Difference]: With dead ends: 226 [2021-05-03 13:51:01,697 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 13:51:01,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 13:51:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 190. [2021-05-03 13:51:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:01,700 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:01,700 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:01,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:01,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:01,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:01,700 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:01,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:01,901 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:01,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:01,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1555032565, now seen corresponding path program 146 times [2021-05-03 13:51:01,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:01,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794929326] [2021-05-03 13:51:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:01,902 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:01,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888159142] [2021-05-03 13:51:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:51:01,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:01,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:01,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:01,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:01,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:01,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:01,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:01,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:02,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:02,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:51:02,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:02,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:02,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,056 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:02,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794929326] [2021-05-03 13:51:02,092 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:02,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888159142] [2021-05-03 13:51:02,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982723315] [2021-05-03 13:51:02,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:02,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:02,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:02,092 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:02,245 INFO L93 Difference]: Finished difference Result 235 states and 587 transitions. [2021-05-03 13:51:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:02,246 INFO L225 Difference]: With dead ends: 235 [2021-05-03 13:51:02,246 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 13:51:02,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 13:51:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 189. [2021-05-03 13:51:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-05-03 13:51:02,249 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-05-03 13:51:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:02,249 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-05-03 13:51:02,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-05-03 13:51:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:02,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:02,249 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:02,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-05-03 13:51:02,449 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1593045831, now seen corresponding path program 147 times [2021-05-03 13:51:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:02,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314592073] [2021-05-03 13:51:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:02,451 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:02,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493820045] [2021-05-03 13:51:02,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:02,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:02,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:02,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:02,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:02,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:02,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:02,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:02,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:02,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:51:02,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:02,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:02,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:02,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:02,632 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:02,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314592073] [2021-05-03 13:51:02,655 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:02,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493820045] [2021-05-03 13:51:02,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:02,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767349499] [2021-05-03 13:51:02,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:02,656 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:02,833 INFO L93 Difference]: Finished difference Result 217 states and 541 transitions. [2021-05-03 13:51:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:02,834 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:51:02,834 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:51:02,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:51:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 191. [2021-05-03 13:51:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-05-03 13:51:02,837 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-05-03 13:51:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:02,837 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-05-03 13:51:02,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-05-03 13:51:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:02,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:02,837 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:03,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,053 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash -983577759, now seen corresponding path program 148 times [2021-05-03 13:51:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:03,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404862265] [2021-05-03 13:51:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:03,054 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:03,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161900835] [2021-05-03 13:51:03,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:03,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:03,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:03,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:03,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:03,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:03,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:51:03,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:03,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:03,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,206 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404862265] [2021-05-03 13:51:03,241 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161900835] [2021-05-03 13:51:03,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:03,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:03,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008606141] [2021-05-03 13:51:03,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:03,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:03,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:03,242 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:03,383 INFO L93 Difference]: Finished difference Result 227 states and 566 transitions. [2021-05-03 13:51:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:03,384 INFO L225 Difference]: With dead ends: 227 [2021-05-03 13:51:03,384 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 13:51:03,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:03,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 13:51:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 190. [2021-05-03 13:51:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:03,386 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:03,386 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:03,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:03,386 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:03,387 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:03,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 13:51:03,597 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:03,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:03,597 INFO L82 PathProgramCache]: Analyzing trace with hash -965143733, now seen corresponding path program 149 times [2021-05-03 13:51:03,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:03,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667871901] [2021-05-03 13:51:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:03,599 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:03,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528326487] [2021-05-03 13:51:03,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:03,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:03,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:03,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:03,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:03,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:03,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:03,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:03,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:51:03,721 INFO L446 ElimStorePlain]: Different costs {0=[v_A_162], 5=[F]} [2021-05-03 13:51:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:03,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,753 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:03,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:03,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:03,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:03,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:03,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667871901] [2021-05-03 13:51:03,808 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:03,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528326487] [2021-05-03 13:51:03,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:03,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:03,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036229216] [2021-05-03 13:51:03,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:03,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:03,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:03,809 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:03,984 INFO L93 Difference]: Finished difference Result 214 states and 538 transitions. [2021-05-03 13:51:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:03,985 INFO L225 Difference]: With dead ends: 214 [2021-05-03 13:51:03,985 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 13:51:03,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 13:51:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 190. [2021-05-03 13:51:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:03,988 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:03,988 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:03,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:03,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:03,988 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:04,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-03 13:51:04,189 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:04,189 INFO L82 PathProgramCache]: Analyzing trace with hash -555750705, now seen corresponding path program 150 times [2021-05-03 13:51:04,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:04,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394308998] [2021-05-03 13:51:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:04,190 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:04,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694445517] [2021-05-03 13:51:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:04,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:04,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:04,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:04,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:04,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:04,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:51:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:04,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:04,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:04,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,368 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:04,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:04,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394308998] [2021-05-03 13:51:04,391 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:04,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694445517] [2021-05-03 13:51:04,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:04,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206749665] [2021-05-03 13:51:04,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:04,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:04,392 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:04,558 INFO L93 Difference]: Finished difference Result 220 states and 548 transitions. [2021-05-03 13:51:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:04,559 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:51:04,559 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:51:04,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:51:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-05-03 13:51:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.56020942408377) internal successors, (489), 191 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 489 transitions. [2021-05-03 13:51:04,561 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 489 transitions. Word has length 16 [2021-05-03 13:51:04,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:04,561 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 489 transitions. [2021-05-03 13:51:04,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:04,561 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 489 transitions. [2021-05-03 13:51:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:04,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:04,562 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:04,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 13:51:04,777 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1162593001, now seen corresponding path program 151 times [2021-05-03 13:51:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:04,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089649291] [2021-05-03 13:51:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:04,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:04,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880396575] [2021-05-03 13:51:04,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:04,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:04,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:04,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:51:04,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:04,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:04,940 INFO L446 ElimStorePlain]: Different costs {0=[v_A_166], 5=[F]} [2021-05-03 13:51:04,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:04,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:51:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 13:51:04,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 13:51:04,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-05-03 13:51:04,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:04,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:04,962 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:29 [2021-05-03 13:51:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089649291] [2021-05-03 13:51:04,999 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880396575] [2021-05-03 13:51:04,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:04,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:04,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98424536] [2021-05-03 13:51:04,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:04,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:05,000 INFO L87 Difference]: Start difference. First operand 192 states and 489 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:05,190 INFO L93 Difference]: Finished difference Result 230 states and 573 transitions. [2021-05-03 13:51:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:05,190 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:05,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:05,191 INFO L225 Difference]: With dead ends: 230 [2021-05-03 13:51:05,191 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 13:51:05,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:05,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 13:51:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 191. [2021-05-03 13:51:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-05-03 13:51:05,193 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-05-03 13:51:05,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:05,193 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-05-03 13:51:05,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-05-03 13:51:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:05,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:05,194 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:05,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-03 13:51:05,394 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1181027027, now seen corresponding path program 152 times [2021-05-03 13:51:05,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:05,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68320945] [2021-05-03 13:51:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:05,396 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493685691] [2021-05-03 13:51:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:05,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:05,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:05,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:05,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:05,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:05,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:05,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:51:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:05,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:05,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:05,520 INFO L446 ElimStorePlain]: Different costs {0=[v_A_168], 5=[F]} [2021-05-03 13:51:05,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:05,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:05,543 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:05,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:05,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:05,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:05,550 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68320945] [2021-05-03 13:51:05,603 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:05,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493685691] [2021-05-03 13:51:05,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:05,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:05,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941052992] [2021-05-03 13:51:05,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:05,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:05,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:05,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:05,604 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:05,776 INFO L93 Difference]: Finished difference Result 217 states and 545 transitions. [2021-05-03 13:51:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:05,777 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:51:05,777 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:51:05,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:51:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-05-03 13:51:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:05,779 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:05,779 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:05,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:05,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:05,780 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:05,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,980 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:05,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1797782965, now seen corresponding path program 153 times [2021-05-03 13:51:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:05,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598923116] [2021-05-03 13:51:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:05,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:05,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144116254] [2021-05-03 13:51:05,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:06,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:06,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:06,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:06,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:06,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-05-03 13:51:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:06,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:51:06,105 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:06,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:06,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:06,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598923116] [2021-05-03 13:51:06,174 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:06,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144116254] [2021-05-03 13:51:06,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:06,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:06,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710076641] [2021-05-03 13:51:06,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:06,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:06,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:06,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:06,175 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:06,341 INFO L93 Difference]: Finished difference Result 217 states and 547 transitions. [2021-05-03 13:51:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:06,342 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:51:06,342 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:51:06,342 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:51:06,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-05-03 13:51:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:06,344 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:06,344 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:06,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:06,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:06,345 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:06,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:06,566 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:06,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1551033415, now seen corresponding path program 154 times [2021-05-03 13:51:06,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:06,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780665342] [2021-05-03 13:51:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:06,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:06,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500112975] [2021-05-03 13:51:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:06,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:06,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:06,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:06,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:06,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:06,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:06,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:06,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:06,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:06,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:06,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780665342] [2021-05-03 13:51:06,763 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500112975] [2021-05-03 13:51:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:06,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:06,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528084057] [2021-05-03 13:51:06,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:06,764 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:06,931 INFO L93 Difference]: Finished difference Result 220 states and 552 transitions. [2021-05-03 13:51:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:06,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:06,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:06,932 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:51:06,932 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:51:06,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:51:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-05-03 13:51:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.56020942408377) internal successors, (489), 191 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 489 transitions. [2021-05-03 13:51:06,934 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 489 transitions. Word has length 16 [2021-05-03 13:51:06,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:06,934 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 489 transitions. [2021-05-03 13:51:06,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 489 transitions. [2021-05-03 13:51:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:06,934 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:06,934 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:07,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,135 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1025590175, now seen corresponding path program 155 times [2021-05-03 13:51:07,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:07,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459694381] [2021-05-03 13:51:07,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:07,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:07,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006742008] [2021-05-03 13:51:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:07,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:07,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:07,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:07,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:07,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:07,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:07,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:07,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:07,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459694381] [2021-05-03 13:51:07,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:07,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006742008] [2021-05-03 13:51:07,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:07,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:07,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251872114] [2021-05-03 13:51:07,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:07,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:07,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:07,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:07,329 INFO L87 Difference]: Start difference. First operand 192 states and 489 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:07,489 INFO L93 Difference]: Finished difference Result 230 states and 577 transitions. [2021-05-03 13:51:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:07,490 INFO L225 Difference]: With dead ends: 230 [2021-05-03 13:51:07,490 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 13:51:07,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 13:51:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 191. [2021-05-03 13:51:07,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.5526315789473686) internal successors, (485), 190 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 485 transitions. [2021-05-03 13:51:07,492 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 485 transitions. Word has length 16 [2021-05-03 13:51:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:07,492 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 485 transitions. [2021-05-03 13:51:07,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 485 transitions. [2021-05-03 13:51:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:07,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:07,493 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:07,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,693 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1007156149, now seen corresponding path program 156 times [2021-05-03 13:51:07,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:07,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28163096] [2021-05-03 13:51:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:07,695 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:07,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649512778] [2021-05-03 13:51:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:51:07,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:07,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:07,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:07,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:07,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:07,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:51:07,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:07,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:07,867 INFO L446 ElimStorePlain]: Different costs {0=[v_A_176], 5=[F]} [2021-05-03 13:51:07,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:07,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,897 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:07,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:07,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:07,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:07,907 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:07,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28163096] [2021-05-03 13:51:07,971 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:07,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649512778] [2021-05-03 13:51:07,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:07,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:07,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229436567] [2021-05-03 13:51:07,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:07,972 INFO L87 Difference]: Start difference. First operand 191 states and 485 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:08,146 INFO L93 Difference]: Finished difference Result 217 states and 549 transitions. [2021-05-03 13:51:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:08,147 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:51:08,147 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:51:08,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:51:08,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 190. [2021-05-03 13:51:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.544973544973545) internal successors, (481), 189 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 481 transitions. [2021-05-03 13:51:08,149 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 481 transitions. Word has length 16 [2021-05-03 13:51:08,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:08,149 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 481 transitions. [2021-05-03 13:51:08,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,149 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 481 transitions. [2021-05-03 13:51:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:08,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:08,149 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:08,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,350 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 309001155, now seen corresponding path program 157 times [2021-05-03 13:51:08,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:08,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421739441] [2021-05-03 13:51:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:08,352 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:08,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154411277] [2021-05-03 13:51:08,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:08,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:08,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:08,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:08,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:08,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:08,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:08,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:51:08,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:08,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:08,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:51:08,486 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:08,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:08,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:08,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:08,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:08,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:08,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421739441] [2021-05-03 13:51:08,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:08,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154411277] [2021-05-03 13:51:08,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421657773] [2021-05-03 13:51:08,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:08,548 INFO L87 Difference]: Start difference. First operand 190 states and 481 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:08,706 INFO L93 Difference]: Finished difference Result 217 states and 549 transitions. [2021-05-03 13:51:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:08,706 INFO L225 Difference]: With dead ends: 217 [2021-05-03 13:51:08,706 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 13:51:08,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:08,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 13:51:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-05-03 13:51:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.5372340425531914) internal successors, (477), 188 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 477 transitions. [2021-05-03 13:51:08,709 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 477 transitions. Word has length 16 [2021-05-03 13:51:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:08,709 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 477 transitions. [2021-05-03 13:51:08,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 477 transitions. [2021-05-03 13:51:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:08,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:08,709 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:08,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,909 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1825134125, now seen corresponding path program 158 times [2021-05-03 13:51:08,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:08,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384766163] [2021-05-03 13:51:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:08,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:08,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285545933] [2021-05-03 13:51:08,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:51:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:09,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384766163] [2021-05-03 13:51:09,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:09,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285545933] [2021-05-03 13:51:09,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:09,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-03 13:51:09,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763897779] [2021-05-03 13:51:09,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:51:09,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:09,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:51:09,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:09,055 INFO L87 Difference]: Start difference. First operand 189 states and 477 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:09,194 INFO L93 Difference]: Finished difference Result 207 states and 516 transitions. [2021-05-03 13:51:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:51:09,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:09,195 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:51:09,195 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:51:09,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:51:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:51:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-05-03 13:51:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-05-03 13:51:09,198 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-05-03 13:51:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:09,198 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-05-03 13:51:09,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-05-03 13:51:09,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:09,199 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:09,199 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:09,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:09,413 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1839795381, now seen corresponding path program 159 times [2021-05-03 13:51:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:09,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192287106] [2021-05-03 13:51:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:09,415 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:09,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543693278] [2021-05-03 13:51:09,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:51:09,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:09,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:09,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:09,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:09,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:09,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:09,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:09,532 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:09,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:09,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:09,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192287106] [2021-05-03 13:51:09,595 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:09,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543693278] [2021-05-03 13:51:09,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:09,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:09,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845678500] [2021-05-03 13:51:09,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:09,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:09,595 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:09,710 INFO L93 Difference]: Finished difference Result 211 states and 531 transitions. [2021-05-03 13:51:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:09,710 INFO L225 Difference]: With dead ends: 211 [2021-05-03 13:51:09,711 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 13:51:09,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 13:51:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 183. [2021-05-03 13:51:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-05-03 13:51:09,713 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-05-03 13:51:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:09,713 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-05-03 13:51:09,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-05-03 13:51:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:09,713 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:09,713 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:09,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 13:51:09,918 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:09,918 INFO L82 PathProgramCache]: Analyzing trace with hash 982486595, now seen corresponding path program 160 times [2021-05-03 13:51:09,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:09,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390564717] [2021-05-03 13:51:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:09,919 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:09,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743181252] [2021-05-03 13:51:09,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:09,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:09,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:09,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:09,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:09,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:09,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:09,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:10,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:10,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:51:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:10,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:10,077 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390564717] [2021-05-03 13:51:10,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743181252] [2021-05-03 13:51:10,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:10,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:10,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353080398] [2021-05-03 13:51:10,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:10,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:10,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:10,107 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:10,255 INFO L93 Difference]: Finished difference Result 202 states and 508 transitions. [2021-05-03 13:51:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:10,256 INFO L225 Difference]: With dead ends: 202 [2021-05-03 13:51:10,256 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 13:51:10,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 13:51:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 185. [2021-05-03 13:51:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5543478260869565) internal successors, (470), 184 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 470 transitions. [2021-05-03 13:51:10,258 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 470 transitions. Word has length 16 [2021-05-03 13:51:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:10,258 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 470 transitions. [2021-05-03 13:51:10,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 470 transitions. [2021-05-03 13:51:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:10,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:10,258 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:10,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 13:51:10,459 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1583433367, now seen corresponding path program 161 times [2021-05-03 13:51:10,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:10,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028814347] [2021-05-03 13:51:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:10,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:10,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870545815] [2021-05-03 13:51:10,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:10,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:51:10,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:10,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:10,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:10,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:10,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:10,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:10,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-05-03 13:51:10,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:10,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:10,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:10,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:10,631 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028814347] [2021-05-03 13:51:10,655 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870545815] [2021-05-03 13:51:10,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:10,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119845730] [2021-05-03 13:51:10,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:10,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:10,656 INFO L87 Difference]: Start difference. First operand 185 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:10,828 INFO L93 Difference]: Finished difference Result 209 states and 525 transitions. [2021-05-03 13:51:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:10,829 INFO L225 Difference]: With dead ends: 209 [2021-05-03 13:51:10,829 INFO L226 Difference]: Without dead ends: 206 [2021-05-03 13:51:10,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-03 13:51:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 186. [2021-05-03 13:51:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.556756756756757) internal successors, (473), 185 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 473 transitions. [2021-05-03 13:51:10,831 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 473 transitions. Word has length 16 [2021-05-03 13:51:10,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:10,831 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 473 transitions. [2021-05-03 13:51:10,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 473 transitions. [2021-05-03 13:51:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:10,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:10,831 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:11,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-03 13:51:11,032 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash 134910339, now seen corresponding path program 162 times [2021-05-03 13:51:11,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:11,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106580921] [2021-05-03 13:51:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:11,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:11,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231161459] [2021-05-03 13:51:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:11,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:11,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:11,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:11,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:11,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:11,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:11,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-05-03 13:51:11,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:11,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:11,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,185 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106580921] [2021-05-03 13:51:11,221 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:11,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231161459] [2021-05-03 13:51:11,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:11,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:11,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294353570] [2021-05-03 13:51:11,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:11,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:11,221 INFO L87 Difference]: Start difference. First operand 186 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:11,372 INFO L93 Difference]: Finished difference Result 218 states and 549 transitions. [2021-05-03 13:51:11,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:11,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:11,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:11,373 INFO L225 Difference]: With dead ends: 218 [2021-05-03 13:51:11,373 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 13:51:11,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 13:51:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 184. [2021-05-03 13:51:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.551912568306011) internal successors, (467), 183 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 467 transitions. [2021-05-03 13:51:11,375 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 467 transitions. Word has length 16 [2021-05-03 13:51:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:11,375 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 467 transitions. [2021-05-03 13:51:11,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 467 transitions. [2021-05-03 13:51:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:11,376 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:11,376 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:11,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,581 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1011978561, now seen corresponding path program 163 times [2021-05-03 13:51:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:11,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594641662] [2021-05-03 13:51:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:11,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:11,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276221329] [2021-05-03 13:51:11,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:11,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:11,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:11,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:11,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:11,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:51:11,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:11,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:11,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:11,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:11,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594641662] [2021-05-03 13:51:11,777 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276221329] [2021-05-03 13:51:11,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:11,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:11,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232586839] [2021-05-03 13:51:11,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:11,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:11,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:11,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:11,777 INFO L87 Difference]: Start difference. First operand 184 states and 467 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:11,938 INFO L93 Difference]: Finished difference Result 204 states and 516 transitions. [2021-05-03 13:51:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:11,939 INFO L225 Difference]: With dead ends: 204 [2021-05-03 13:51:11,939 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 13:51:11,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 13:51:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 186. [2021-05-03 13:51:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.556756756756757) internal successors, (473), 185 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 473 transitions. [2021-05-03 13:51:11,941 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 473 transitions. Word has length 16 [2021-05-03 13:51:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:11,941 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 473 transitions. [2021-05-03 13:51:11,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 473 transitions. [2021-05-03 13:51:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:11,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:11,941 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:12,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:12,142 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash 706365145, now seen corresponding path program 164 times [2021-05-03 13:51:12,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:12,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342668005] [2021-05-03 13:51:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:12,143 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:12,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751878902] [2021-05-03 13:51:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:12,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:12,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:12,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:12,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:12,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:12,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:12,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-05-03 13:51:12,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:12,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:12,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342668005] [2021-05-03 13:51:12,324 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:12,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751878902] [2021-05-03 13:51:12,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:12,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486929837] [2021-05-03 13:51:12,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:12,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:12,325 INFO L87 Difference]: Start difference. First operand 186 states and 473 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:12,477 INFO L93 Difference]: Finished difference Result 214 states and 541 transitions. [2021-05-03 13:51:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:12,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:12,477 INFO L225 Difference]: With dead ends: 214 [2021-05-03 13:51:12,478 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 13:51:12,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 13:51:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 185. [2021-05-03 13:51:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.5543478260869565) internal successors, (470), 184 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 470 transitions. [2021-05-03 13:51:12,480 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 470 transitions. Word has length 16 [2021-05-03 13:51:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:12,480 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 470 transitions. [2021-05-03 13:51:12,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 470 transitions. [2021-05-03 13:51:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:12,480 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:12,480 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:12,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:12,681 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:12,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:12,681 INFO L82 PathProgramCache]: Analyzing trace with hash 724799171, now seen corresponding path program 165 times [2021-05-03 13:51:12,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:12,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102313405] [2021-05-03 13:51:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:12,682 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:12,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399374553] [2021-05-03 13:51:12,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:12,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:12,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:12,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:12,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:12,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2021-05-03 13:51:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:12,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 13:51:12,808 INFO L446 ElimStorePlain]: Different costs {0=[v_A_192], 5=[F]} [2021-05-03 13:51:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:12,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,831 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:12,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:12,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:12,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:12,838 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102313405] [2021-05-03 13:51:12,884 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:12,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399374553] [2021-05-03 13:51:12,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:12,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:12,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376393371] [2021-05-03 13:51:12,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:12,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:12,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:12,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:12,885 INFO L87 Difference]: Start difference. First operand 185 states and 470 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:13,036 INFO L93 Difference]: Finished difference Result 207 states and 525 transitions. [2021-05-03 13:51:13,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:13,037 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:51:13,037 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:51:13,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:51:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2021-05-03 13:51:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.5494505494505493) internal successors, (464), 182 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 464 transitions. [2021-05-03 13:51:13,039 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 464 transitions. Word has length 16 [2021-05-03 13:51:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:13,039 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 464 transitions. [2021-05-03 13:51:13,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 464 transitions. [2021-05-03 13:51:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:13,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:13,040 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:13,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-03 13:51:13,240 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:13,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:13,240 INFO L82 PathProgramCache]: Analyzing trace with hash 385734557, now seen corresponding path program 166 times [2021-05-03 13:51:13,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:13,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131722649] [2021-05-03 13:51:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:13,242 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:13,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194379817] [2021-05-03 13:51:13,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:13,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:51:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:13,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:13,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:30 [2021-05-03 13:51:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:13,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:51:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:51:13,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:51:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-05-03 13:51:13,379 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:51:13,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:51:13,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:13,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:41, output treesize:16 [2021-05-03 13:51:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131722649] [2021-05-03 13:51:13,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:13,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194379817] [2021-05-03 13:51:13,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:13,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:13,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475453479] [2021-05-03 13:51:13,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:13,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:13,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:13,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:13,432 INFO L87 Difference]: Start difference. First operand 183 states and 464 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:13,632 INFO L93 Difference]: Finished difference Result 225 states and 562 transitions. [2021-05-03 13:51:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:13,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:13,633 INFO L225 Difference]: With dead ends: 225 [2021-05-03 13:51:13,633 INFO L226 Difference]: Without dead ends: 221 [2021-05-03 13:51:13,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-03 13:51:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 179. [2021-05-03 13:51:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-05-03 13:51:13,635 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 16 [2021-05-03 13:51:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:13,635 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-05-03 13:51:13,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-05-03 13:51:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:13,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:13,635 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:13,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,836 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:13,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:13,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1134192199, now seen corresponding path program 167 times [2021-05-03 13:51:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:13,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114264058] [2021-05-03 13:51:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:13,838 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:13,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23332461] [2021-05-03 13:51:13,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:51:13,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:13,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:13,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-05-03 13:51:13,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:13,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:13,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:13,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:13,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:13,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:13,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114264058] [2021-05-03 13:51:14,024 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:14,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23332461] [2021-05-03 13:51:14,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:14,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:14,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522064664] [2021-05-03 13:51:14,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:14,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:14,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:14,025 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:14,186 INFO L93 Difference]: Finished difference Result 210 states and 524 transitions. [2021-05-03 13:51:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:14,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:14,187 INFO L225 Difference]: With dead ends: 210 [2021-05-03 13:51:14,187 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 13:51:14,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 13:51:14,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2021-05-03 13:51:14,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.552486187845304) internal successors, (462), 181 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 462 transitions. [2021-05-03 13:51:14,189 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 462 transitions. Word has length 16 [2021-05-03 13:51:14,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:14,190 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 462 transitions. [2021-05-03 13:51:14,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 462 transitions. [2021-05-03 13:51:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:14,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:14,190 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:14,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,405 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1442431391, now seen corresponding path program 168 times [2021-05-03 13:51:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:14,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651720147] [2021-05-03 13:51:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:14,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:14,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484815929] [2021-05-03 13:51:14,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:14,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:14,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:14,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:14,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:51:14,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:14,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:14,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:14,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:14,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:14,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:14,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651720147] [2021-05-03 13:51:14,600 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:14,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484815929] [2021-05-03 13:51:14,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:14,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457157726] [2021-05-03 13:51:14,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:14,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:14,601 INFO L87 Difference]: Start difference. First operand 182 states and 462 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:14,754 INFO L93 Difference]: Finished difference Result 220 states and 549 transitions. [2021-05-03 13:51:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:14,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:14,755 INFO L225 Difference]: With dead ends: 220 [2021-05-03 13:51:14,755 INFO L226 Difference]: Without dead ends: 217 [2021-05-03 13:51:14,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:14,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-03 13:51:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 181. [2021-05-03 13:51:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.55) internal successors, (459), 180 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 459 transitions. [2021-05-03 13:51:14,757 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 459 transitions. Word has length 16 [2021-05-03 13:51:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:14,757 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 459 transitions. [2021-05-03 13:51:14,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 459 transitions. [2021-05-03 13:51:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:14,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:14,758 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:14,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,958 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1423997365, now seen corresponding path program 169 times [2021-05-03 13:51:14,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:14,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128183358] [2021-05-03 13:51:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:14,960 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:14,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796956189] [2021-05-03 13:51:14,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:15,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:15,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:15,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-05-03 13:51:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:15,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:15,086 INFO L446 ElimStorePlain]: Different costs {0=[v_A_201], 5=[F]} [2021-05-03 13:51:15,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:15,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,113 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:15,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:15,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:15,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128183358] [2021-05-03 13:51:15,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796956189] [2021-05-03 13:51:15,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:15,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:15,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648293938] [2021-05-03 13:51:15,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:15,170 INFO L87 Difference]: Start difference. First operand 181 states and 459 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:15,320 INFO L93 Difference]: Finished difference Result 207 states and 524 transitions. [2021-05-03 13:51:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:15,322 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:51:15,322 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:51:15,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:51:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-05-03 13:51:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.547486033519553) internal successors, (456), 179 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 456 transitions. [2021-05-03 13:51:15,325 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 456 transitions. Word has length 16 [2021-05-03 13:51:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:15,325 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 456 transitions. [2021-05-03 13:51:15,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 456 transitions. [2021-05-03 13:51:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:15,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:15,326 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:15,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:15,548 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:15,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:15,548 INFO L82 PathProgramCache]: Analyzing trace with hash -107840061, now seen corresponding path program 170 times [2021-05-03 13:51:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:15,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001531344] [2021-05-03 13:51:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:15,550 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:15,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291390887] [2021-05-03 13:51:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:15,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:15,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2021-05-03 13:51:15,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:15,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-05-03 13:51:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:15,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:51:15,672 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:15,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:15,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:15,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:15,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:15,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001531344] [2021-05-03 13:51:15,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:15,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291390887] [2021-05-03 13:51:15,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:15,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:15,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234437681] [2021-05-03 13:51:15,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:15,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:15,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:15,735 INFO L87 Difference]: Start difference. First operand 180 states and 456 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:15,887 INFO L93 Difference]: Finished difference Result 207 states and 525 transitions. [2021-05-03 13:51:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:15,887 INFO L225 Difference]: With dead ends: 207 [2021-05-03 13:51:15,888 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 13:51:15,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 13:51:15,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 178. [2021-05-03 13:51:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.536723163841808) internal successors, (449), 177 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) [2021-05-03 13:51:15,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 449 transitions. [2021-05-03 13:51:15,890 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 449 transitions. Word has length 16 [2021-05-03 13:51:15,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:15,890 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 449 transitions. [2021-05-03 13:51:15,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 449 transitions. [2021-05-03 13:51:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:15,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:15,890 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:16,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:16,090 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1053990977, now seen corresponding path program 171 times [2021-05-03 13:51:16,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:16,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507014869] [2021-05-03 13:51:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:16,092 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:16,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527798529] [2021-05-03 13:51:16,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:16,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:16,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:16,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:16,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:16,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:16,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:51:16,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:16,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:16,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:16,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,261 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507014869] [2021-05-03 13:51:16,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527798529] [2021-05-03 13:51:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:16,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730011162] [2021-05-03 13:51:16,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:16,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:16,286 INFO L87 Difference]: Start difference. First operand 178 states and 449 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:16,439 INFO L93 Difference]: Finished difference Result 211 states and 523 transitions. [2021-05-03 13:51:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:16,440 INFO L225 Difference]: With dead ends: 211 [2021-05-03 13:51:16,440 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 13:51:16,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 13:51:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 180. [2021-05-03 13:51:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.541899441340782) internal successors, (455), 179 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) [2021-05-03 13:51:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 455 transitions. [2021-05-03 13:51:16,442 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 455 transitions. Word has length 16 [2021-05-03 13:51:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:16,442 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 455 transitions. [2021-05-03 13:51:16,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 455 transitions. [2021-05-03 13:51:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:16,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:16,443 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:16,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-03 13:51:16,657 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash 664352729, now seen corresponding path program 172 times [2021-05-03 13:51:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:16,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016329858] [2021-05-03 13:51:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:16,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:16,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050814144] [2021-05-03 13:51:16,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:16,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:16,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:16,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:16,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:16,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:16,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,734 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:51:16,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:16,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:16,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:16,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:16,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:16,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:16,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016329858] [2021-05-03 13:51:16,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050814144] [2021-05-03 13:51:16,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:16,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:16,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926112740] [2021-05-03 13:51:16,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:16,855 INFO L87 Difference]: Start difference. First operand 180 states and 455 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:17,027 INFO L93 Difference]: Finished difference Result 221 states and 548 transitions. [2021-05-03 13:51:17,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:17,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:17,027 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:51:17,027 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:51:17,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:51:17,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 179. [2021-05-03 13:51:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.539325842696629) internal successors, (452), 178 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 452 transitions. [2021-05-03 13:51:17,030 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 452 transitions. Word has length 16 [2021-05-03 13:51:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:17,030 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 452 transitions. [2021-05-03 13:51:17,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 452 transitions. [2021-05-03 13:51:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:17,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:17,030 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:17,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-03 13:51:17,231 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 682786755, now seen corresponding path program 173 times [2021-05-03 13:51:17,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:17,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938024773] [2021-05-03 13:51:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:17,233 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:17,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55774115] [2021-05-03 13:51:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:51:17,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:17,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:17,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:17,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:17,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:51:17,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:17,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:17,379 INFO L446 ElimStorePlain]: Different costs {0=[v_A_209], 5=[F]} [2021-05-03 13:51:17,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:17,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,409 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:17,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:17,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938024773] [2021-05-03 13:51:17,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55774115] [2021-05-03 13:51:17,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:17,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:17,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735987563] [2021-05-03 13:51:17,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:17,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:17,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:17,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:17,487 INFO L87 Difference]: Start difference. First operand 179 states and 452 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:17,674 INFO L93 Difference]: Finished difference Result 208 states and 523 transitions. [2021-05-03 13:51:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:17,675 INFO L225 Difference]: With dead ends: 208 [2021-05-03 13:51:17,675 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 13:51:17,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 13:51:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 178. [2021-05-03 13:51:17,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.536723163841808) internal successors, (449), 177 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) [2021-05-03 13:51:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 449 transitions. [2021-05-03 13:51:17,677 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 449 transitions. Word has length 16 [2021-05-03 13:51:17,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:17,677 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 449 transitions. [2021-05-03 13:51:17,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 449 transitions. [2021-05-03 13:51:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:17,677 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:17,677 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:17,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:17,878 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1998944059, now seen corresponding path program 174 times [2021-05-03 13:51:17,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:17,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60639294] [2021-05-03 13:51:17,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:17,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:17,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729318211] [2021-05-03 13:51:17,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:17,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:51:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:17,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:17,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:17,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:17,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:51:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:17,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:17,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:17,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:37 [2021-05-03 13:51:18,027 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:18,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:18,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:18,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,050 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60639294] [2021-05-03 13:51:18,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729318211] [2021-05-03 13:51:18,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:18,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:18,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541156146] [2021-05-03 13:51:18,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:18,114 INFO L87 Difference]: Start difference. First operand 178 states and 449 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:18,275 INFO L93 Difference]: Finished difference Result 208 states and 524 transitions. [2021-05-03 13:51:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:18,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:18,275 INFO L225 Difference]: With dead ends: 208 [2021-05-03 13:51:18,275 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 13:51:18,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 13:51:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 177. [2021-05-03 13:51:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.528409090909091) internal successors, (445), 176 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 445 transitions. [2021-05-03 13:51:18,277 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 445 transitions. Word has length 16 [2021-05-03 13:51:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:18,278 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 445 transitions. [2021-05-03 13:51:18,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 445 transitions. [2021-05-03 13:51:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:18,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:18,278 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:18,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-05-03 13:51:18,478 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:18,479 INFO L82 PathProgramCache]: Analyzing trace with hash -149852477, now seen corresponding path program 175 times [2021-05-03 13:51:18,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:18,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114790779] [2021-05-03 13:51:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:18,485 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:18,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659745674] [2021-05-03 13:51:18,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:51:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:18,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-05-03 13:51:18,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:18,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:18,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:18,611 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:18,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:18,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:18,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:18,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114790779] [2021-05-03 13:51:18,676 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:18,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659745674] [2021-05-03 13:51:18,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:18,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:18,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69967319] [2021-05-03 13:51:18,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:18,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:18,677 INFO L87 Difference]: Start difference. First operand 177 states and 445 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:18,837 INFO L93 Difference]: Finished difference Result 208 states and 521 transitions. [2021-05-03 13:51:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:18,838 INFO L225 Difference]: With dead ends: 208 [2021-05-03 13:51:18,838 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 13:51:18,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 13:51:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-05-03 13:51:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.528735632183908) internal successors, (440), 174 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 440 transitions. [2021-05-03 13:51:18,840 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 440 transitions. Word has length 16 [2021-05-03 13:51:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:18,840 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 440 transitions. [2021-05-03 13:51:18,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 440 transitions. [2021-05-03 13:51:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:18,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:18,841 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:19,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,041 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -611091837, now seen corresponding path program 176 times [2021-05-03 13:51:19,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:19,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305447953] [2021-05-03 13:51:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:19,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:19,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578852657] [2021-05-03 13:51:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:19,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:19,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:51:19,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:19,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2021-05-03 13:51:19,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:19,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:19,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:19,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-05-03 13:51:19,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,212 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305447953] [2021-05-03 13:51:19,235 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:19,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578852657] [2021-05-03 13:51:19,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:19,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:19,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42542550] [2021-05-03 13:51:19,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:19,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:19,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:19,236 INFO L87 Difference]: Start difference. First operand 175 states and 440 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:19,432 INFO L93 Difference]: Finished difference Result 211 states and 520 transitions. [2021-05-03 13:51:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:19,433 INFO L225 Difference]: With dead ends: 211 [2021-05-03 13:51:19,433 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 13:51:19,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:19,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 13:51:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 177. [2021-05-03 13:51:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.534090909090909) internal successors, (446), 176 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) [2021-05-03 13:51:19,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 446 transitions. [2021-05-03 13:51:19,435 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 446 transitions. Word has length 16 [2021-05-03 13:51:19,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:19,435 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 446 transitions. [2021-05-03 13:51:19,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 446 transitions. [2021-05-03 13:51:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:19,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:19,436 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:19,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,636 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1107251869, now seen corresponding path program 177 times [2021-05-03 13:51:19,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:19,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386624364] [2021-05-03 13:51:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:19,638 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:19,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332497071] [2021-05-03 13:51:19,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:19,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:19,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:19,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:19,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:51:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:19,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:19,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:45 [2021-05-03 13:51:19,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-05-03 13:51:19,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-05-03 13:51:19,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:19,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:19,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-03 13:51:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386624364] [2021-05-03 13:51:19,951 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:19,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332497071] [2021-05-03 13:51:19,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:19,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:19,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722937659] [2021-05-03 13:51:19,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:19,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:19,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:19,951 INFO L87 Difference]: Start difference. First operand 177 states and 446 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:20,141 INFO L93 Difference]: Finished difference Result 221 states and 545 transitions. [2021-05-03 13:51:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:20,142 INFO L225 Difference]: With dead ends: 221 [2021-05-03 13:51:20,142 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 13:51:20,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:20,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 13:51:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 176. [2021-05-03 13:51:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.5314285714285716) internal successors, (443), 175 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 443 transitions. [2021-05-03 13:51:20,144 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 443 transitions. Word has length 16 [2021-05-03 13:51:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:20,144 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 443 transitions. [2021-05-03 13:51:20,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 443 transitions. [2021-05-03 13:51:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:20,144 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:20,144 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:20,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:20,345 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1125685895, now seen corresponding path program 178 times [2021-05-03 13:51:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:20,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721458877] [2021-05-03 13:51:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:20,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:20,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980942139] [2021-05-03 13:51:20,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:20,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:20,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:20,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:20,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:51:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:20,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-03 13:51:20,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-03 13:51:20,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-03 13:51:20,474 INFO L446 ElimStorePlain]: Different costs {0=[v_A_219], 5=[F]} [2021-05-03 13:51:20,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:20,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,497 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:20,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 13:51:20,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-05-03 13:51:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:20,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721458877] [2021-05-03 13:51:20,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:20,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980942139] [2021-05-03 13:51:20,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:20,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:20,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313339521] [2021-05-03 13:51:20,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:20,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:20,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:20,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:20,553 INFO L87 Difference]: Start difference. First operand 176 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:20,715 INFO L93 Difference]: Finished difference Result 215 states and 533 transitions. [2021-05-03 13:51:20,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:20,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:20,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:20,716 INFO L225 Difference]: With dead ends: 215 [2021-05-03 13:51:20,716 INFO L226 Difference]: Without dead ends: 212 [2021-05-03 13:51:20,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-03 13:51:20,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-03 13:51:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.528735632183908) internal successors, (440), 174 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 440 transitions. [2021-05-03 13:51:20,718 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 440 transitions. Word has length 16 [2021-05-03 13:51:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:20,718 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 440 transitions. [2021-05-03 13:51:20,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 440 transitions. [2021-05-03 13:51:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:20,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:20,719 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:20,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:20,919 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1853124097, now seen corresponding path program 179 times [2021-05-03 13:51:20,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270440973] [2021-05-03 13:51:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:20,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:20,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210594357] [2021-05-03 13:51:20,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:20,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-05-03 13:51:20,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:51:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:20,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:20,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:20,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2021-05-03 13:51:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:21,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-05-03 13:51:21,052 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:21,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:21,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:21,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270440973] [2021-05-03 13:51:21,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:21,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210594357] [2021-05-03 13:51:21,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:21,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:21,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394803418] [2021-05-03 13:51:21,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:21,117 INFO L87 Difference]: Start difference. First operand 175 states and 440 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:21,270 INFO L93 Difference]: Finished difference Result 218 states and 542 transitions. [2021-05-03 13:51:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:21,271 INFO L225 Difference]: With dead ends: 218 [2021-05-03 13:51:21,271 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 13:51:21,271 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:21,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 13:51:21,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 174. [2021-05-03 13:51:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.520231213872832) internal successors, (436), 173 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 436 transitions. [2021-05-03 13:51:21,274 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 436 transitions. Word has length 16 [2021-05-03 13:51:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:21,274 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 436 transitions. [2021-05-03 13:51:21,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 436 transitions. [2021-05-03 13:51:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:21,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:21,274 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:21,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-05-03 13:51:21,490 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:21,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:21,490 INFO L82 PathProgramCache]: Analyzing trace with hash 293046663, now seen corresponding path program 180 times [2021-05-03 13:51:21,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:21,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471655380] [2021-05-03 13:51:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:21,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:21,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908088772] [2021-05-03 13:51:21,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:21,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:21,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:21,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:21,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:51:21,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:21,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-05-03 13:51:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:21,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:51:21,621 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:21,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:21,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:21,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:21,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:21,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:21,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471655380] [2021-05-03 13:51:21,690 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:21,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908088772] [2021-05-03 13:51:21,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:21,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:21,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289588530] [2021-05-03 13:51:21,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:21,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:21,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:21,691 INFO L87 Difference]: Start difference. First operand 174 states and 436 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:21,863 INFO L93 Difference]: Finished difference Result 219 states and 545 transitions. [2021-05-03 13:51:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:21,864 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:21,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:21,864 INFO L225 Difference]: With dead ends: 219 [2021-05-03 13:51:21,864 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 13:51:21,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 13:51:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 173. [2021-05-03 13:51:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.5174418604651163) internal successors, (433), 172 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 433 transitions. [2021-05-03 13:51:21,866 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 433 transitions. Word has length 16 [2021-05-03 13:51:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:21,866 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 433 transitions. [2021-05-03 13:51:21,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 433 transitions. [2021-05-03 13:51:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:21,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:21,866 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:22,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:22,067 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash -801044925, now seen corresponding path program 181 times [2021-05-03 13:51:22,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:22,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094233106] [2021-05-03 13:51:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:22,070 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:22,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730902281] [2021-05-03 13:51:22,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 13:51:22,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:22,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:22,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:22,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:51:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:22,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:22,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:51:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-05-03 13:51:22,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:22,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2021-05-03 13:51:22,194 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-05-03 13:51:22,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 35 [2021-05-03 13:51:22,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:22,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-05-03 13:51:22,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:22,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:22,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-05-03 13:51:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:22,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094233106] [2021-05-03 13:51:22,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:22,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730902281] [2021-05-03 13:51:22,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:22,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383888321] [2021-05-03 13:51:22,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:22,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:22,278 INFO L87 Difference]: Start difference. First operand 173 states and 433 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:22,532 INFO L93 Difference]: Finished difference Result 229 states and 576 transitions. [2021-05-03 13:51:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:22,533 INFO L225 Difference]: With dead ends: 229 [2021-05-03 13:51:22,533 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 13:51:22,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 13:51:22,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2021-05-03 13:51:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.538922155688623) internal successors, (424), 167 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 424 transitions. [2021-05-03 13:51:22,535 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 424 transitions. Word has length 16 [2021-05-03 13:51:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:22,535 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 424 transitions. [2021-05-03 13:51:22,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 424 transitions. [2021-05-03 13:51:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 13:51:22,536 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:22,536 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:22,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 13:51:22,737 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash -919129405, now seen corresponding path program 182 times [2021-05-03 13:51:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:22,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989164602] [2021-05-03 13:51:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:22,739 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:22,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465023057] [2021-05-03 13:51:22,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:22,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:22,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:22,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:51:22,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989164602] [2021-05-03 13:51:22,836 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:22,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465023057] [2021-05-03 13:51:22,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:22,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:51:22,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991096696] [2021-05-03 13:51:22,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:51:22,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:51:22,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:51:22,837 INFO L87 Difference]: Start difference. First operand 168 states and 424 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:23,003 INFO L93 Difference]: Finished difference Result 228 states and 571 transitions. [2021-05-03 13:51:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 13:51:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:23,004 INFO L225 Difference]: With dead ends: 228 [2021-05-03 13:51:23,004 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 13:51:23,004 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:51:23,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 13:51:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2021-05-03 13:51:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.5345911949685536) internal successors, (403), 159 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2021-05-03 13:51:23,006 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 16 [2021-05-03 13:51:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:23,006 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2021-05-03 13:51:23,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2021-05-03 13:51:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:23,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:23,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:23,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-05-03 13:51:23,207 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:23,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1571347686, now seen corresponding path program 183 times [2021-05-03 13:51:23,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:23,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771468178] [2021-05-03 13:51:23,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:23,209 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:23,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286005942] [2021-05-03 13:51:23,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:23,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:51:23,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:23,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 13:51:23,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:23,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:23,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:23,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:23,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:23,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2021-05-03 13:51:23,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 13:51:23,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:23,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:23,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:23,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2021-05-03 13:51:23,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-03 13:51:23,336 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:51:23,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:23,364 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-05-03 13:51:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2021-05-03 13:51:23,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:23,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:23,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:51:23,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:51, output treesize:45 [2021-05-03 13:51:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:23,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771468178] [2021-05-03 13:51:23,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:23,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286005942] [2021-05-03 13:51:23,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:23,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:51:23,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906031249] [2021-05-03 13:51:23,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:51:23,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:23,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:51:23,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:51:23,553 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-05-03 13:51:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:23,795 INFO L93 Difference]: Finished difference Result 186 states and 437 transitions. [2021-05-03 13:51:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:23,796 INFO L225 Difference]: With dead ends: 186 [2021-05-03 13:51:23,796 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 13:51:23,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:51:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 13:51:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2021-05-03 13:51:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.5448717948717947) internal successors, (397), 156 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 397 transitions. [2021-05-03 13:51:23,799 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 397 transitions. Word has length 17 [2021-05-03 13:51:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:23,799 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 397 transitions. [2021-05-03 13:51:23,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-05-03 13:51:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 397 transitions. [2021-05-03 13:51:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:23,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:23,799 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:23,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 13:51:24,000 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:24,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1566265809, now seen corresponding path program 184 times [2021-05-03 13:51:24,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:24,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505080129] [2021-05-03 13:51:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:24,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:24,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265540597] [2021-05-03 13:51:24,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:24,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:51:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:24,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505080129] [2021-05-03 13:51:24,152 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:24,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265540597] [2021-05-03 13:51:24,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:24,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-03 13:51:24,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329590524] [2021-05-03 13:51:24,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:51:24,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:51:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:24,153 INFO L87 Difference]: Start difference. First operand 157 states and 397 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:24,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:24,403 INFO L93 Difference]: Finished difference Result 229 states and 548 transitions. [2021-05-03 13:51:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:51:24,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:24,405 INFO L225 Difference]: With dead ends: 229 [2021-05-03 13:51:24,405 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 13:51:24,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:51:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 13:51:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2021-05-03 13:51:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.502994011976048) internal successors, (418), 167 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 418 transitions. [2021-05-03 13:51:24,407 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 418 transitions. Word has length 17 [2021-05-03 13:51:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:24,408 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 418 transitions. [2021-05-03 13:51:24,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 418 transitions. [2021-05-03 13:51:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:24,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:24,408 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:24,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-03 13:51:24,617 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:24,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:24,617 INFO L82 PathProgramCache]: Analyzing trace with hash -35767269, now seen corresponding path program 185 times [2021-05-03 13:51:24,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:24,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016208068] [2021-05-03 13:51:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:24,619 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:24,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913497587] [2021-05-03 13:51:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:24,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:51:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:24,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:51:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:24,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016208068] [2021-05-03 13:51:24,747 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:24,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913497587] [2021-05-03 13:51:24,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:24,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-03 13:51:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799602464] [2021-05-03 13:51:24,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:51:24,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:24,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:51:24,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:24,747 INFO L87 Difference]: Start difference. First operand 168 states and 418 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:25,147 INFO L93 Difference]: Finished difference Result 302 states and 719 transitions. [2021-05-03 13:51:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:25,148 INFO L225 Difference]: With dead ends: 302 [2021-05-03 13:51:25,148 INFO L226 Difference]: Without dead ends: 299 [2021-05-03 13:51:25,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:51:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-03 13:51:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 196. [2021-05-03 13:51:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6153846153846154) internal successors, (510), 195 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 510 transitions. [2021-05-03 13:51:25,151 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 510 transitions. Word has length 17 [2021-05-03 13:51:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:25,151 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 510 transitions. [2021-05-03 13:51:25,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 510 transitions. [2021-05-03 13:51:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:25,151 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:25,151 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:25,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,352 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash -146589789, now seen corresponding path program 186 times [2021-05-03 13:51:25,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508305084] [2021-05-03 13:51:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:25,354 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470368526] [2021-05-03 13:51:25,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:25,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:25,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 13:51:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-05-03 13:51:25,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2021-05-03 13:51:25,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 13:51:25,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2021-05-03 13:51:25,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 13:51:25,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-05-03 13:51:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 13:51:25,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2021-05-03 13:51:25,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:51 [2021-05-03 13:51:25,537 INFO L354 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2021-05-03 13:51:25,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 42 [2021-05-03 13:51:25,539 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 13:51:25,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 13:51:25,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 13:51:25,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-03 13:51:25,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:25 [2021-05-03 13:51:25,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:25,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508305084] [2021-05-03 13:51:25,623 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:25,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470368526] [2021-05-03 13:51:25,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:25,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-03 13:51:25,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790112543] [2021-05-03 13:51:25,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:51:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:51:25,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:25,624 INFO L87 Difference]: Start difference. First operand 196 states and 510 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:25,969 INFO L93 Difference]: Finished difference Result 288 states and 699 transitions. [2021-05-03 13:51:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:25,970 INFO L225 Difference]: With dead ends: 288 [2021-05-03 13:51:25,970 INFO L226 Difference]: Without dead ends: 285 [2021-05-03 13:51:25,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-03 13:51:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 197. [2021-05-03 13:51:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.622448979591837) internal successors, (514), 196 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 514 transitions. [2021-05-03 13:51:25,973 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 514 transitions. Word has length 17 [2021-05-03 13:51:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:25,973 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 514 transitions. [2021-05-03 13:51:25,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 514 transitions. [2021-05-03 13:51:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:25,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:25,973 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 13:51:26,174 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash -414980841, now seen corresponding path program 187 times [2021-05-03 13:51:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:26,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175263670] [2021-05-03 13:51:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:26,176 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267739709] [2021-05-03 13:51:26,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:26,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:51:26,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:26,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175263670] [2021-05-03 13:51:26,318 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:26,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267739709] [2021-05-03 13:51:26,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:26,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-03 13:51:26,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062607509] [2021-05-03 13:51:26,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:51:26,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:26,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:51:26,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:26,319 INFO L87 Difference]: Start difference. First operand 197 states and 514 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:26,710 INFO L93 Difference]: Finished difference Result 304 states and 733 transitions. [2021-05-03 13:51:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:26,711 INFO L225 Difference]: With dead ends: 304 [2021-05-03 13:51:26,711 INFO L226 Difference]: Without dead ends: 301 [2021-05-03 13:51:26,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:51:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-03 13:51:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 203. [2021-05-03 13:51:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.618811881188119) internal successors, (529), 202 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 529 transitions. [2021-05-03 13:51:26,715 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 529 transitions. Word has length 17 [2021-05-03 13:51:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:26,715 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 529 transitions. [2021-05-03 13:51:26,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 529 transitions. [2021-05-03 13:51:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:26,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:26,716 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:26,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 13:51:26,929 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:26,929 INFO L82 PathProgramCache]: Analyzing trace with hash 120248961, now seen corresponding path program 188 times [2021-05-03 13:51:26,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:26,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41004112] [2021-05-03 13:51:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:26,931 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:26,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079944424] [2021-05-03 13:51:26,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:26,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:51:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41004112] [2021-05-03 13:51:27,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079944424] [2021-05-03 13:51:27,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:27,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-03 13:51:27,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825691697] [2021-05-03 13:51:27,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:51:27,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:27,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:51:27,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:51:27,035 INFO L87 Difference]: Start difference. First operand 203 states and 529 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-05-03 13:51:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:27,295 INFO L93 Difference]: Finished difference Result 410 states and 936 transitions. [2021-05-03 13:51:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:51:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:27,296 INFO L225 Difference]: With dead ends: 410 [2021-05-03 13:51:27,296 INFO L226 Difference]: Without dead ends: 395 [2021-05-03 13:51:27,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:51:27,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-03 13:51:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 267. [2021-05-03 13:51:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.680451127819549) internal successors, (713), 266 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 713 transitions. [2021-05-03 13:51:27,300 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 713 transitions. Word has length 17 [2021-05-03 13:51:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:27,300 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 713 transitions. [2021-05-03 13:51:27,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2021-05-03 13:51:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 713 transitions. [2021-05-03 13:51:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:27,300 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:27,300 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:27,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:27,502 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 626595227, now seen corresponding path program 189 times [2021-05-03 13:51:27,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:27,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260361490] [2021-05-03 13:51:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:27,505 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:27,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911286170] [2021-05-03 13:51:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:27,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 13:51:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:27,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:27,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260361490] [2021-05-03 13:51:27,662 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:27,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911286170] [2021-05-03 13:51:27,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:27,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-03 13:51:27,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93945074] [2021-05-03 13:51:27,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:51:27,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:51:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:27,663 INFO L87 Difference]: Start difference. First operand 267 states and 713 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:27,941 INFO L93 Difference]: Finished difference Result 357 states and 893 transitions. [2021-05-03 13:51:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:51:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:27,942 INFO L225 Difference]: With dead ends: 357 [2021-05-03 13:51:27,942 INFO L226 Difference]: Without dead ends: 354 [2021-05-03 13:51:27,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-03 13:51:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 269. [2021-05-03 13:51:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.6828358208955225) internal successors, (719), 268 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 719 transitions. [2021-05-03 13:51:27,946 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 719 transitions. Word has length 17 [2021-05-03 13:51:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:27,946 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 719 transitions. [2021-05-03 13:51:27,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-05-03 13:51:27,946 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 719 transitions. [2021-05-03 13:51:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:27,947 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:27,947 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:28,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-03 13:51:28,153 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1990413727, now seen corresponding path program 190 times [2021-05-03 13:51:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124591547] [2021-05-03 13:51:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:28,155 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:28,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720544987] [2021-05-03 13:51:28,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:51:28,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 13:51:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124591547] [2021-05-03 13:51:28,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720544987] [2021-05-03 13:51:28,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:28,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-03 13:51:28,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502940755] [2021-05-03 13:51:28,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:51:28,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:51:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:28,277 INFO L87 Difference]: Start difference. First operand 269 states and 719 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-05-03 13:51:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:28,522 INFO L93 Difference]: Finished difference Result 354 states and 892 transitions. [2021-05-03 13:51:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:51:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:28,523 INFO L225 Difference]: With dead ends: 354 [2021-05-03 13:51:28,523 INFO L226 Difference]: Without dead ends: 333 [2021-05-03 13:51:28,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:51:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-03 13:51:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 294. [2021-05-03 13:51:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.6996587030716723) internal successors, (791), 293 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 791 transitions. [2021-05-03 13:51:28,527 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 791 transitions. Word has length 17 [2021-05-03 13:51:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:28,527 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 791 transitions. [2021-05-03 13:51:28,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-05-03 13:51:28,527 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 791 transitions. [2021-05-03 13:51:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:28,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:28,527 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:28,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:28,728 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1017240957, now seen corresponding path program 191 times [2021-05-03 13:51:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:28,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459852962] [2021-05-03 13:51:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:28,729 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:28,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843548287] [2021-05-03 13:51:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:28,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:51:28,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:28,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:51:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:28,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459852962] [2021-05-03 13:51:28,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-03 13:51:28,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843548287] [2021-05-03 13:51:28,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-03 13:51:28,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-03 13:51:28,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128114080] [2021-05-03 13:51:28,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:51:28,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:51:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:28,862 INFO L87 Difference]: Start difference. First operand 294 states and 791 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2021-05-03 13:51:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:29,011 INFO L93 Difference]: Finished difference Result 423 states and 1083 transitions. [2021-05-03 13:51:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:51:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 13:51:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:29,012 INFO L225 Difference]: With dead ends: 423 [2021-05-03 13:51:29,012 INFO L226 Difference]: Without dead ends: 417 [2021-05-03 13:51:29,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:51:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-03 13:51:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 314. [2021-05-03 13:51:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.7380191693290734) internal successors, (857), 313 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 857 transitions. [2021-05-03 13:51:29,016 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 857 transitions. Word has length 17 [2021-05-03 13:51:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:29,016 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 857 transitions. [2021-05-03 13:51:29,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2021-05-03 13:51:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 857 transitions. [2021-05-03 13:51:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 13:51:29,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:29,017 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:29,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 13:51:29,217 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:29,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1548679005, now seen corresponding path program 192 times [2021-05-03 13:51:29,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:29,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713332777] [2021-05-03 13:51:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:29,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-03 13:51:29,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607671961] [2021-05-03 13:51:29,219 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 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 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown