/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:17:43,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:17:43,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:17:43,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:17:43,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:17:43,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:17:43,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:17:43,200 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:17:43,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:17:43,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:17:43,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:17:43,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:17:43,278 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:17:43,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:17:43,278 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:17:43,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:17:43,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:17:43,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:17:43,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:17:43,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:17:43,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:17:43,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:17:43,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:17:43,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:17:43,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:17:43,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:17:43,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:17:43,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:17:43,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:17:43,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:17:43,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:17:43,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:17:43,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:17:43,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:17:43,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:17:43,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:17:43,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:17:43,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:17:43,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:17:43,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:17:43,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:17:43,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:17:43,921 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:17:43,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-10-23 18:17:44,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd54cd94/55d27eb14e30452fb643c84faa45e70c/FLAG425152095 [2020-10-23 18:17:44,766 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:17:44,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-10-23 18:17:44,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd54cd94/55d27eb14e30452fb643c84faa45e70c/FLAG425152095 [2020-10-23 18:17:45,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acd54cd94/55d27eb14e30452fb643c84faa45e70c [2020-10-23 18:17:45,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:17:45,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:17:45,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:17:45,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:17:45,157 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:17:45,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4cf5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45, skipping insertion in model container [2020-10-23 18:17:45,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:17:45,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:17:45,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:17:45,425 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:17:45,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:17:45,473 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:17:45,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45 WrapperNode [2020-10-23 18:17:45,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:17:45,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:17:45,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:17:45,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:17:45,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (1/1) ... [2020-10-23 18:17:45,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:17:45,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:17:45,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:17:45,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:17:45,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (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 [2020-10-23 18:17:45,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:17:45,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:17:45,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:17:45,647 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 18:17:45,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:17:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:17:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:17:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:17:45,648 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:17:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:17:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 18:17:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:17:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:17:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:17:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:17:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:17:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:17:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:17:45,979 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:17:45,980 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:17:45,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:17:45 BoogieIcfgContainer [2020-10-23 18:17:45,983 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:17:45,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:17:45,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:17:45,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:17:45,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:17:45" (1/3) ... [2020-10-23 18:17:45,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b72d3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:17:45, skipping insertion in model container [2020-10-23 18:17:45,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:17:45" (2/3) ... [2020-10-23 18:17:45,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b72d3dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:17:45, skipping insertion in model container [2020-10-23 18:17:45,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:17:45" (3/3) ... [2020-10-23 18:17:45,999 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-10-23 18:17:46,021 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:17:46,029 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:17:46,052 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:17:46,100 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:17:46,100 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:17:46,100 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:17:46,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:17:46,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:17:46,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:17:46,101 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:17:46,101 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:17:46,162 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-23 18:17:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:17:46,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:46,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:46,173 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:46,185 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-10-23 18:17:46,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:46,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521318622] [2020-10-23 18:17:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:46,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:46,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:46,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:17:46,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521318622] [2020-10-23 18:17:46,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:17:46,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:17:46,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080567278] [2020-10-23 18:17:46,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:17:46,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:17:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:17:46,744 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-23 18:17:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:46,994 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-23 18:17:46,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:17:46,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:17:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:47,007 INFO L225 Difference]: With dead ends: 38 [2020-10-23 18:17:47,008 INFO L226 Difference]: Without dead ends: 20 [2020-10-23 18:17:47,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:17:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-23 18:17:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-23 18:17:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-23 18:17:47,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-23 18:17:47,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-23 18:17:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:47,066 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-23 18:17:47,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:17:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-23 18:17:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 18:17:47,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:47,069 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:47,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:17:47,069 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-10-23 18:17:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:47,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409069406] [2020-10-23 18:17:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:47,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:47,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:17:47,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409069406] [2020-10-23 18:17:47,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712062873] [2020-10-23 18:17:47,383 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 [2020-10-23 18:17:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-23 18:17:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 18:17:47,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:47,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-23 18:17:47,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896209254] [2020-10-23 18:17:47,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 18:17:47,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 18:17:47,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:17:47,603 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-23 18:17:47,789 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-23 18:17:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:48,028 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-23 18:17:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:17:48,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-23 18:17:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:48,030 INFO L225 Difference]: With dead ends: 28 [2020-10-23 18:17:48,030 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:17:48,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:17:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:17:48,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:17:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:17:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-23 18:17:48,042 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-10-23 18:17:48,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:48,043 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-23 18:17:48,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 18:17:48,043 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-23 18:17:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-23 18:17:48,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:48,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:48,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-23 18:17:48,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:48,262 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-10-23 18:17:48,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:48,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457209077] [2020-10-23 18:17:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:48,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:48,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:48,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:48,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:48,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:17:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457209077] [2020-10-23 18:17:48,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239802189] [2020-10-23 18:17:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:48,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:17:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-23 18:17:48,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:17:48,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:48,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-10-23 18:17:48,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362177897] [2020-10-23 18:17:48,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 18:17:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 18:17:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:17:48,661 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2020-10-23 18:17:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:49,115 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-23 18:17:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 18:17:49,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-23 18:17:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:49,117 INFO L225 Difference]: With dead ends: 31 [2020-10-23 18:17:49,117 INFO L226 Difference]: Without dead ends: 26 [2020-10-23 18:17:49,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-23 18:17:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-23 18:17:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-23 18:17:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-23 18:17:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-23 18:17:49,127 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-10-23 18:17:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:49,128 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-23 18:17:49,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 18:17:49,128 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-23 18:17:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 18:17:49,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:49,130 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:49,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:49,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-10-23 18:17:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:49,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090057566] [2020-10-23 18:17:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:17:49,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090057566] [2020-10-23 18:17:49,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074791327] [2020-10-23 18:17:49,674 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 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 [2020-10-23 18:17:49,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 18:17:49,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-23 18:17:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 18:17:49,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:49,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-10-23 18:17:49,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687053047] [2020-10-23 18:17:49,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:17:49,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:17:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:17:49,831 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-10-23 18:17:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:50,445 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-23 18:17:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:17:50,446 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-23 18:17:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:50,447 INFO L225 Difference]: With dead ends: 34 [2020-10-23 18:17:50,448 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 18:17:50,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-10-23 18:17:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 18:17:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 18:17:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 18:17:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-23 18:17:50,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-10-23 18:17:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:50,458 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-23 18:17:50,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:17:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-23 18:17:50,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 18:17:50,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:50,460 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:50,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:50,675 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-10-23 18:17:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:50,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195070333] [2020-10-23 18:17:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:50,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:50,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:50,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:50,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:50,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:51,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:17:51,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195070333] [2020-10-23 18:17:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735641384] [2020-10-23 18:17:51,055 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 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 [2020-10-23 18:17:51,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:17:51,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:51,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-23 18:17:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 18:17:51,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:51,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-10-23 18:17:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558060617] [2020-10-23 18:17:51,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-23 18:17:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-23 18:17:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-23 18:17:51,248 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-10-23 18:17:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:52,043 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-23 18:17:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-23 18:17:52,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-23 18:17:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:52,045 INFO L225 Difference]: With dead ends: 37 [2020-10-23 18:17:52,045 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 18:17:52,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:17:52,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 18:17:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 18:17:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:17:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-23 18:17:52,056 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-10-23 18:17:52,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:52,056 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-23 18:17:52,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-23 18:17:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-23 18:17:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 18:17:52,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:52,058 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:52,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:52,273 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:52,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:52,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-10-23 18:17:52,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:52,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082379625] [2020-10-23 18:17:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:17:52,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082379625] [2020-10-23 18:17:52,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235919334] [2020-10-23 18:17:52,760 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 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 [2020-10-23 18:17:52,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 18:17:52,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:52,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-23 18:17:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 18:17:53,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:53,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-10-23 18:17:53,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034487097] [2020-10-23 18:17:53,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:17:53,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:17:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:17:53,056 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 17 states. [2020-10-23 18:17:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:54,090 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-23 18:17:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:17:54,091 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-23 18:17:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:54,093 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:17:54,093 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:17:54,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:17:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:17:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 18:17:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 18:17:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 18:17:54,115 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-10-23 18:17:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:54,116 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 18:17:54,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:17:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 18:17:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 18:17:54,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:54,119 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:54,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 18:17:54,320 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1624338501, now seen corresponding path program 6 times [2020-10-23 18:17:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:54,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915257535] [2020-10-23 18:17:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:17:54,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915257535] [2020-10-23 18:17:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342950905] [2020-10-23 18:17:54,890 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 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 [2020-10-23 18:17:54,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 18:17:54,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:54,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-23 18:17:54,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 18:17:55,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:55,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-10-23 18:17:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591813499] [2020-10-23 18:17:55,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-23 18:17:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-23 18:17:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-23 18:17:55,088 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 19 states. [2020-10-23 18:17:56,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:56,324 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-23 18:17:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 18:17:56,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-10-23 18:17:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:56,329 INFO L225 Difference]: With dead ends: 43 [2020-10-23 18:17:56,329 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 18:17:56,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=1025, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 18:17:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 18:17:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 18:17:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 18:17:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 18:17:56,348 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-10-23 18:17:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:56,349 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 18:17:56,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-23 18:17:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 18:17:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-23 18:17:56,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:56,353 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:56,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:56,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash 502547855, now seen corresponding path program 7 times [2020-10-23 18:17:56,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:56,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984702342] [2020-10-23 18:17:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:56,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:17:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984702342] [2020-10-23 18:17:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19134853] [2020-10-23 18:17:57,141 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 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 [2020-10-23 18:17:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:57,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-23 18:17:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 18:17:57,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:57,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-10-23 18:17:57,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128251277] [2020-10-23 18:17:57,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:17:57,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:17:57,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:17:57,310 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 21 states. [2020-10-23 18:17:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:17:58,626 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-23 18:17:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-23 18:17:58,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-23 18:17:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:17:58,631 INFO L225 Difference]: With dead ends: 46 [2020-10-23 18:17:58,631 INFO L226 Difference]: Without dead ends: 41 [2020-10-23 18:17:58,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 18:17:58,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-23 18:17:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-23 18:17:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 18:17:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-23 18:17:58,640 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-10-23 18:17:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:17:58,640 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-23 18:17:58,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:17:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-23 18:17:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-23 18:17:58,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:17:58,642 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:17:58,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:58,857 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:17:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:17:58,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1459767611, now seen corresponding path program 8 times [2020-10-23 18:17:58,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:17:58,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885403520] [2020-10-23 18:17:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:17:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:17:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:58,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:17:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:17:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:17:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:17:59,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885403520] [2020-10-23 18:17:59,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751876164] [2020-10-23 18:17:59,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:17:59,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:17:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:17:59,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-23 18:17:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:17:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 18:17:59,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:17:59,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-10-23 18:17:59,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12263494] [2020-10-23 18:17:59,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-23 18:17:59,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:17:59,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-23 18:17:59,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-23 18:17:59,737 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 23 states. [2020-10-23 18:18:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:01,207 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 18:18:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 18:18:01,207 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 63 [2020-10-23 18:18:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:01,209 INFO L225 Difference]: With dead ends: 49 [2020-10-23 18:18:01,210 INFO L226 Difference]: Without dead ends: 44 [2020-10-23 18:18:01,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 18:18:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-23 18:18:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-23 18:18:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 18:18:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-10-23 18:18:01,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-10-23 18:18:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:01,223 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-10-23 18:18:01,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-23 18:18:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-10-23 18:18:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-23 18:18:01,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:01,226 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:01,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-23 18:18:01,428 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:01,429 INFO L82 PathProgramCache]: Analyzing trace with hash 273998991, now seen corresponding path program 9 times [2020-10-23 18:18:01,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:01,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647226441] [2020-10-23 18:18:01,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:01,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:18:02,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647226441] [2020-10-23 18:18:02,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309456432] [2020-10-23 18:18:02,261 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 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 [2020-10-23 18:18:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 18:18:02,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:02,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-23 18:18:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 18:18:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2020-10-23 18:18:02,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940117495] [2020-10-23 18:18:02,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 18:18:02,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:02,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 18:18:02,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:18:02,640 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 25 states. [2020-10-23 18:18:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:04,494 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 18:18:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 18:18:04,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-23 18:18:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:04,496 INFO L225 Difference]: With dead ends: 52 [2020-10-23 18:18:04,497 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 18:18:04,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=133, Invalid=1937, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 18:18:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 18:18:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 18:18:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 18:18:04,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 18:18:04,507 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-10-23 18:18:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:04,507 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 18:18:04,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 18:18:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 18:18:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-23 18:18:04,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:04,512 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:04,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:04,714 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1458107067, now seen corresponding path program 10 times [2020-10-23 18:18:04,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:04,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416628487] [2020-10-23 18:18:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:18:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416628487] [2020-10-23 18:18:05,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692433948] [2020-10-23 18:18:05,702 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 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 [2020-10-23 18:18:05,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:18:05,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-23 18:18:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 18:18:05,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:05,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2020-10-23 18:18:05,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465937478] [2020-10-23 18:18:05,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-23 18:18:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-23 18:18:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-10-23 18:18:05,900 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 27 states. [2020-10-23 18:18:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:08,070 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-23 18:18:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-23 18:18:08,076 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 75 [2020-10-23 18:18:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:08,077 INFO L225 Difference]: With dead ends: 55 [2020-10-23 18:18:08,077 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 18:18:08,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 18:18:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 18:18:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 18:18:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 18:18:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 18:18:08,087 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-10-23 18:18:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:08,088 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 18:18:08,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-23 18:18:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 18:18:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 18:18:08,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:08,089 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:08,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:08,306 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -764791921, now seen corresponding path program 11 times [2020-10-23 18:18:08,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:08,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168547691] [2020-10-23 18:18:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:09,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:09,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:09,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:09,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:18:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168547691] [2020-10-23 18:18:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343839199] [2020-10-23 18:18:09,434 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 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 [2020-10-23 18:18:11,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:18:11,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 51 conjunts are in the unsatisfiable core [2020-10-23 18:18:11,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 18:18:12,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:12,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2020-10-23 18:18:12,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541813128] [2020-10-23 18:18:12,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 18:18:12,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 18:18:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:18:12,100 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 29 states. [2020-10-23 18:18:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:14,550 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-23 18:18:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 18:18:14,550 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-10-23 18:18:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:14,552 INFO L225 Difference]: With dead ends: 58 [2020-10-23 18:18:14,552 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 18:18:14,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 18:18:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 18:18:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-23 18:18:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 18:18:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-23 18:18:14,562 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 81 [2020-10-23 18:18:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:14,563 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-23 18:18:14,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 18:18:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-23 18:18:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 18:18:14,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:14,564 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:14,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-23 18:18:14,774 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1532398651, now seen corresponding path program 12 times [2020-10-23 18:18:14,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:14,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908090950] [2020-10-23 18:18:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:14,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:14,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:14,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:18:15,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908090950] [2020-10-23 18:18:15,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61814250] [2020-10-23 18:18:15,947 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 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 [2020-10-23 18:18:16,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:18:16,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:16,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 55 conjunts are in the unsatisfiable core [2020-10-23 18:18:16,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 18:18:16,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:16,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2020-10-23 18:18:16,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924910310] [2020-10-23 18:18:16,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-23 18:18:16,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:16,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-23 18:18:16,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-10-23 18:18:16,342 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 31 states. [2020-10-23 18:18:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:19,103 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 18:18:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 18:18:19,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2020-10-23 18:18:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:19,105 INFO L225 Difference]: With dead ends: 61 [2020-10-23 18:18:19,105 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 18:18:19,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=169, Invalid=3137, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:18:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 18:18:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-23 18:18:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 18:18:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-10-23 18:18:19,119 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-10-23 18:18:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:19,119 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-10-23 18:18:19,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-23 18:18:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-10-23 18:18:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-23 18:18:19,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:19,121 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:19,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 18:18:19,326 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash -913821041, now seen corresponding path program 13 times [2020-10-23 18:18:19,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:19,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293250231] [2020-10-23 18:18:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:19,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:18:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293250231] [2020-10-23 18:18:20,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057636156] [2020-10-23 18:18:20,621 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2020-10-23 18:18:20,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 18:18:20,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:20,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2020-10-23 18:18:20,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376595106] [2020-10-23 18:18:20,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-23 18:18:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:20,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-23 18:18:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-10-23 18:18:20,889 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 33 states. [2020-10-23 18:18:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:24,024 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-23 18:18:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-23 18:18:24,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2020-10-23 18:18:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:24,027 INFO L225 Difference]: With dead ends: 64 [2020-10-23 18:18:24,027 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 18:18:24,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 18:18:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 18:18:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 18:18:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 18:18:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 18:18:24,046 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 93 [2020-10-23 18:18:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:24,052 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 18:18:24,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-23 18:18:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 18:18:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-23 18:18:24,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:24,054 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:24,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-23 18:18:24,255 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1648421445, now seen corresponding path program 14 times [2020-10-23 18:18:24,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:24,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748173766] [2020-10-23 18:18:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:24,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:18:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748173766] [2020-10-23 18:18:25,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939768549] [2020-10-23 18:18:25,693 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 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 [2020-10-23 18:18:25,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:18:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-23 18:18:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 18:18:25,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:25,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2020-10-23 18:18:25,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889025619] [2020-10-23 18:18:25,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-23 18:18:25,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:25,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-23 18:18:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:18:25,930 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 35 states. [2020-10-23 18:18:29,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:29,330 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 18:18:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 18:18:29,331 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2020-10-23 18:18:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:29,332 INFO L225 Difference]: With dead ends: 67 [2020-10-23 18:18:29,332 INFO L226 Difference]: Without dead ends: 62 [2020-10-23 18:18:29,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 18:18:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-23 18:18:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-23 18:18:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 18:18:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2020-10-23 18:18:29,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 99 [2020-10-23 18:18:29,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:29,343 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2020-10-23 18:18:29,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-23 18:18:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2020-10-23 18:18:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-23 18:18:29,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:29,344 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:29,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:29,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1745019279, now seen corresponding path program 15 times [2020-10-23 18:18:29,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:29,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469030679] [2020-10-23 18:18:29,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:29,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:30,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:18:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469030679] [2020-10-23 18:18:31,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900343491] [2020-10-23 18:18:31,014 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 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 [2020-10-23 18:18:31,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:18:31,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 67 conjunts are in the unsatisfiable core [2020-10-23 18:18:31,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 18:18:31,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:31,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2020-10-23 18:18:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026448693] [2020-10-23 18:18:31,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 18:18:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 18:18:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:18:31,626 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 37 states. [2020-10-23 18:18:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:35,365 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 18:18:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 18:18:35,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 105 [2020-10-23 18:18:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:35,367 INFO L225 Difference]: With dead ends: 70 [2020-10-23 18:18:35,367 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 18:18:35,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 18:18:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 18:18:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 18:18:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:18:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 18:18:35,377 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 105 [2020-10-23 18:18:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:35,378 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 18:18:35,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 18:18:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 18:18:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:18:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:35,379 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:35,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 18:18:35,583 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash -345411387, now seen corresponding path program 16 times [2020-10-23 18:18:35,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:35,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514470115] [2020-10-23 18:18:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:35,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:36,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:18:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514470115] [2020-10-23 18:18:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745890017] [2020-10-23 18:18:37,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:18:37,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:18:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:18:37,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 71 conjunts are in the unsatisfiable core [2020-10-23 18:18:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:18:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 18:18:37,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:18:37,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2020-10-23 18:18:37,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593743631] [2020-10-23 18:18:37,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-23 18:18:37,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:18:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-23 18:18:37,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 18:18:37,476 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 39 states. [2020-10-23 18:18:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:18:41,670 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 18:18:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-23 18:18:41,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 111 [2020-10-23 18:18:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:18:41,673 INFO L225 Difference]: With dead ends: 73 [2020-10-23 18:18:41,673 INFO L226 Difference]: Without dead ends: 68 [2020-10-23 18:18:41,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=217, Invalid=5185, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 18:18:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-23 18:18:41,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-23 18:18:41,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 18:18:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-10-23 18:18:41,690 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 111 [2020-10-23 18:18:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:18:41,691 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-10-23 18:18:41,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-23 18:18:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-10-23 18:18:41,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-23 18:18:41,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:18:41,692 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:18:41,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 18:18:41,895 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:18:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:18:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1831747727, now seen corresponding path program 17 times [2020-10-23 18:18:41,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:18:41,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747884594] [2020-10-23 18:18:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:18:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:18:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:18:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:42,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 18:18:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:18:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 18:18:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747884594] [2020-10-23 18:18:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264903345] [2020-10-23 18:18:43,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true