/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/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:57:52,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:57:52,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:57:52,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:57:52,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:57:52,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:57:52,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:57:52,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:57:52,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:57:52,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:57:52,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:57:52,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:57:52,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:57:52,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:57:52,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:57:52,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:57:52,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:57:52,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:57:52,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:57:52,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:57:52,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:57:52,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:57:52,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:57:52,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:57:52,194 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:57:52,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:57:52,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:57:52,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:57:52,212 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 17:57:52,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:57:52,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:57:52,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:57:52,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:57:52,281 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:57:52,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:57:52,282 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:57:52,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:57:52,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:57:52,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:57:52,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:57:52,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:57:52,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:57:52,285 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:57:52,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:57:52,285 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:57:52,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:57:52,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:57:52,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:57:52,286 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:57:52,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:57:52,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:57:52,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:57:52,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:57:52,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:57:52,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:57:52,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:57:52,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:57:52,289 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:57:52,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:57:52,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:57:52,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:57:52,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:57:52,842 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:57:52,843 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:57:52,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-10-23 17:57:52,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6895e18e3/06b1b40225e643efb64cc7bfd1cdcfcc/FLAGf566be3a0 [2020-10-23 17:57:53,574 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:57:53,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-10-23 17:57:53,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6895e18e3/06b1b40225e643efb64cc7bfd1cdcfcc/FLAGf566be3a0 [2020-10-23 17:57:53,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6895e18e3/06b1b40225e643efb64cc7bfd1cdcfcc [2020-10-23 17:57:53,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:57:53,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:57:53,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:53,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:57:53,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:57:53,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:53" (1/1) ... [2020-10-23 17:57:53,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a9b1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:53, skipping insertion in model container [2020-10-23 17:57:53,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:53" (1/1) ... [2020-10-23 17:57:54,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:57:54,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:57:54,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:54,255 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:57:54,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:57:54,293 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:57:54,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54 WrapperNode [2020-10-23 17:57:54,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:57:54,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:57:54,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:57:54,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:57:54,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (1/1) ... [2020-10-23 17:57:54,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:57:54,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:57:54,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:57:54,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:57:54,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (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 17:57:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:57:54,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:57:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:57:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-10-23 17:57:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-10-23 17:57:54,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:57:54,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-10-23 17:57:54,413 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:57:54,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:57:54,697 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:57:54,698 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 17:57:54,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:54 BoogieIcfgContainer [2020-10-23 17:57:54,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:57:54,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:57:54,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:57:54,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:57:54,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:53" (1/3) ... [2020-10-23 17:57:54,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558185f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:54, skipping insertion in model container [2020-10-23 17:57:54,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:54" (2/3) ... [2020-10-23 17:57:54,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@558185f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:54, skipping insertion in model container [2020-10-23 17:57:54,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:54" (3/3) ... [2020-10-23 17:57:54,711 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-10-23 17:57:54,726 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:57:54,732 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:57:54,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:57:54,787 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:57:54,787 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:57:54,787 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:57:54,787 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:57:54,788 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:57:54,788 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:57:54,788 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:57:54,788 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:57:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-23 17:57:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 17:57:54,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:54,865 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:54,865 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:54,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1267163760, now seen corresponding path program 1 times [2020-10-23 17:57:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:54,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345310217] [2020-10-23 17:57:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,422 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 14 [2020-10-23 17:57:55,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:55,558 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 17:57:55,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345310217] [2020-10-23 17:57:55,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:55,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 17:57:55,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198242587] [2020-10-23 17:57:55,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 17:57:55,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:55,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 17:57:55,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:57:55,589 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 8 states. [2020-10-23 17:57:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:56,073 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-23 17:57:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:57:56,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-23 17:57:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:56,087 INFO L225 Difference]: With dead ends: 49 [2020-10-23 17:57:56,087 INFO L226 Difference]: Without dead ends: 29 [2020-10-23 17:57:56,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:57:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-23 17:57:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-23 17:57:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 17:57:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-23 17:57:56,150 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2020-10-23 17:57:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:56,150 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-23 17:57:56,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 17:57:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-23 17:57:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-23 17:57:56,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:56,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:56,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:57:56,154 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:56,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1353598010, now seen corresponding path program 1 times [2020-10-23 17:57:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665439099] [2020-10-23 17:57:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:56,448 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 16 [2020-10-23 17:57:56,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:56,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:56,552 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 17:57:56,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665439099] [2020-10-23 17:57:56,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:56,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 17:57:56,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054822911] [2020-10-23 17:57:56,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 17:57:56,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:56,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 17:57:56,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 17:57:56,558 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2020-10-23 17:57:56,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:56,995 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-23 17:57:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:57:56,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-23 17:57:56,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:56,997 INFO L225 Difference]: With dead ends: 36 [2020-10-23 17:57:56,998 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 17:57:56,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:57:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 17:57:57,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-23 17:57:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 17:57:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-23 17:57:57,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2020-10-23 17:57:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:57,010 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-23 17:57:57,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 17:57:57,010 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-23 17:57:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 17:57:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:57,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:57,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:57:57,012 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1380467407, now seen corresponding path program 1 times [2020-10-23 17:57:57,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:57,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644237788] [2020-10-23 17:57:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,140 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 17:57:57,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644237788] [2020-10-23 17:57:57,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:57,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 17:57:57,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126426541] [2020-10-23 17:57:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:57:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:57:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 17:57:57,144 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-10-23 17:57:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:57,395 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-23 17:57:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:57:57,396 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-23 17:57:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:57,397 INFO L225 Difference]: With dead ends: 44 [2020-10-23 17:57:57,397 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 17:57:57,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 17:57:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-23 17:57:57,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-23 17:57:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-23 17:57:57,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2020-10-23 17:57:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:57,407 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-23 17:57:57,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:57:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-23 17:57:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 17:57:57,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:57,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:57,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 17:57:57,410 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:57,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1100607130, now seen corresponding path program 1 times [2020-10-23 17:57:57,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:57,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847607898] [2020-10-23 17:57:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:57,747 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 17:57:57,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847607898] [2020-10-23 17:57:57,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:57,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-23 17:57:57,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225629615] [2020-10-23 17:57:57,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-23 17:57:57,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:57,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-23 17:57:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-23 17:57:57,750 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2020-10-23 17:57:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:58,331 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-23 17:57:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 17:57:58,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-23 17:57:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:58,334 INFO L225 Difference]: With dead ends: 39 [2020-10-23 17:57:58,334 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 17:57:58,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:57:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 17:57:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 17:57:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 17:57:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-23 17:57:58,343 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-23 17:57:58,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:58,344 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-23 17:57:58,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-23 17:57:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-23 17:57:58,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 17:57:58,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:58,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:58,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 17:57:58,346 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:58,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:58,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1462998947, now seen corresponding path program 1 times [2020-10-23 17:57:58,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:58,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768931670] [2020-10-23 17:57:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-23 17:57:58,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768931670] [2020-10-23 17:57:58,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:57:58,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 17:57:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574180655] [2020-10-23 17:57:58,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 17:57:58,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 17:57:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 17:57:58,476 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-23 17:57:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:57:58,691 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-23 17:57:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 17:57:58,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-23 17:57:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:57:58,693 INFO L225 Difference]: With dead ends: 45 [2020-10-23 17:57:58,693 INFO L226 Difference]: Without dead ends: 32 [2020-10-23 17:57:58,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:57:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-23 17:57:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-23 17:57:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 17:57:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 17:57:58,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 30 [2020-10-23 17:57:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:57:58,703 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 17:57:58,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 17:57:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 17:57:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 17:57:58,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:57:58,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:57:58,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 17:57:58,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:57:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:57:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1815013415, now seen corresponding path program 1 times [2020-10-23 17:57:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:57:58,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665594820] [2020-10-23 17:57:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:57:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,895 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-10-23 17:57:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:57:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:57:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:58,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:57:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 17:57:59,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665594820] [2020-10-23 17:57:59,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803446134] [2020-10-23 17:57:59,093 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 17:57:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:57:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-23 17:57:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:57:59,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:57:59,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:57:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-23 17:57:59,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:57:59,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2020-10-23 17:57:59,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876104898] [2020-10-23 17:57:59,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 17:57:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:57:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 17:57:59,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-23 17:57:59,717 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 16 states. [2020-10-23 17:58:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:00,698 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-23 17:58:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 17:58:00,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-23 17:58:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:00,700 INFO L225 Difference]: With dead ends: 45 [2020-10-23 17:58:00,700 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 17:58:00,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-10-23 17:58:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 17:58:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-23 17:58:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 17:58:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-23 17:58:00,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-23 17:58:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:00,710 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-23 17:58:00,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 17:58:00,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-23 17:58:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 17:58:00,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:00,712 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:00,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 17:58:00,926 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 509875021, now seen corresponding path program 1 times [2020-10-23 17:58:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:00,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076370602] [2020-10-23 17:58:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 17:58:01,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076370602] [2020-10-23 17:58:01,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947334246] [2020-10-23 17:58:01,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-23 17:58:01,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:01,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:01,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 17:58:01,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:01,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2020-10-23 17:58:01,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906914777] [2020-10-23 17:58:01,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 17:58:01,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 17:58:01,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:58:01,796 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2020-10-23 17:58:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:02,847 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-23 17:58:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 17:58:02,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-23 17:58:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:02,849 INFO L225 Difference]: With dead ends: 51 [2020-10-23 17:58:02,849 INFO L226 Difference]: Without dead ends: 46 [2020-10-23 17:58:02,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-23 17:58:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-23 17:58:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-10-23 17:58:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 17:58:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-23 17:58:02,868 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 38 [2020-10-23 17:58:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:02,869 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-23 17:58:02,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 17:58:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-23 17:58:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-23 17:58:02,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:02,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:03,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:03,090 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash -221902968, now seen corresponding path program 2 times [2020-10-23 17:58:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:03,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830838701] [2020-10-23 17:58:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,286 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 18 [2020-10-23 17:58:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-23 17:58:03,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830838701] [2020-10-23 17:58:03,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373827843] [2020-10-23 17:58:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:03,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:58:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-23 17:58:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:03,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:03,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-23 17:58:04,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:04,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 20 [2020-10-23 17:58:04,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448450402] [2020-10-23 17:58:04,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 17:58:04,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 17:58:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-23 17:58:04,153 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2020-10-23 17:58:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:05,519 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-23 17:58:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 17:58:05,520 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2020-10-23 17:58:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:05,521 INFO L225 Difference]: With dead ends: 57 [2020-10-23 17:58:05,522 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 17:58:05,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 17:58:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 17:58:05,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-23 17:58:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-23 17:58:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-23 17:58:05,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 45 [2020-10-23 17:58:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:05,532 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-23 17:58:05,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 17:58:05,532 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-23 17:58:05,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 17:58:05,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:05,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:05,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:05,743 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1700064768, now seen corresponding path program 2 times [2020-10-23 17:58:05,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:05,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847752501] [2020-10-23 17:58:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:05,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:05,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:05,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:06,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:06,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:06,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:06,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-23 17:58:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847752501] [2020-10-23 17:58:06,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121209314] [2020-10-23 17:58:06,318 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 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 17:58:06,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:58:06,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2020-10-23 17:58:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:06,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:06,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-23 17:58:06,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:06,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 21 [2020-10-23 17:58:06,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759579753] [2020-10-23 17:58:06,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 17:58:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:06,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 17:58:06,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-23 17:58:06,757 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 21 states. [2020-10-23 17:58:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:08,334 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-23 17:58:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 17:58:08,335 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-23 17:58:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:08,337 INFO L225 Difference]: With dead ends: 63 [2020-10-23 17:58:08,337 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 17:58:08,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 17:58:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 17:58:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-23 17:58:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-23 17:58:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-23 17:58:08,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 52 [2020-10-23 17:58:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:08,348 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-23 17:58:08,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 17:58:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-23 17:58:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-23 17:58:08,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:08,350 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:08,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:08,559 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1817856489, now seen corresponding path program 3 times [2020-10-23 17:58:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:08,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732637254] [2020-10-23 17:58:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,769 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 18 [2020-10-23 17:58:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-23 17:58:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732637254] [2020-10-23 17:58:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843306436] [2020-10-23 17:58:09,362 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 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 17:58:09,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 17:58:09,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:09,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 64 conjunts are in the unsatisfiable core [2020-10-23 17:58:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:09,641 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:09,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-23 17:58:09,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:09,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 24 [2020-10-23 17:58:09,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736368382] [2020-10-23 17:58:09,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 17:58:09,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 17:58:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-23 17:58:09,841 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 24 states. [2020-10-23 17:58:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:11,655 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-23 17:58:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 17:58:11,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2020-10-23 17:58:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:11,658 INFO L225 Difference]: With dead ends: 69 [2020-10-23 17:58:11,658 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 17:58:11,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 17:58:11,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 17:58:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2020-10-23 17:58:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 17:58:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-23 17:58:11,670 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 59 [2020-10-23 17:58:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:11,671 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-23 17:58:11,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 17:58:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-23 17:58:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 17:58:11,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:11,672 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:11,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-23 17:58:11,888 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -297234765, now seen corresponding path program 3 times [2020-10-23 17:58:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:11,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333897862] [2020-10-23 17:58:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-23 17:58:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333897862] [2020-10-23 17:58:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493420780] [2020-10-23 17:58:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:12,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-23 17:58:12,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 72 conjunts are in the unsatisfiable core [2020-10-23 17:58:12,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:12,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:12,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-23 17:58:13,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:13,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 25 [2020-10-23 17:58:13,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942371521] [2020-10-23 17:58:13,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 17:58:13,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:13,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 17:58:13,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2020-10-23 17:58:13,212 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 25 states. [2020-10-23 17:58:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:15,305 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-23 17:58:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-23 17:58:15,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-10-23 17:58:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:15,306 INFO L225 Difference]: With dead ends: 75 [2020-10-23 17:58:15,306 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 17:58:15,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=167, Invalid=1813, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 17:58:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 17:58:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-10-23 17:58:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 17:58:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-23 17:58:15,330 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 66 [2020-10-23 17:58:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:15,331 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-23 17:58:15,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 17:58:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-23 17:58:15,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-23 17:58:15,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:15,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:15,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:15,554 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -255402166, now seen corresponding path program 4 times [2020-10-23 17:58:15,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:15,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710588575] [2020-10-23 17:58:15,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:15,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:15,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:15,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:15,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 17:58:16,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710588575] [2020-10-23 17:58:16,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812051188] [2020-10-23 17:58:16,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:16,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 17:58:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 80 conjunts are in the unsatisfiable core [2020-10-23 17:58:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:16,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:16,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-23 17:58:17,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:17,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 28 [2020-10-23 17:58:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33802798] [2020-10-23 17:58:17,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 17:58:17,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 17:58:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2020-10-23 17:58:17,060 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 28 states. [2020-10-23 17:58:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:19,529 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-23 17:58:19,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 17:58:19,530 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 73 [2020-10-23 17:58:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:19,532 INFO L225 Difference]: With dead ends: 81 [2020-10-23 17:58:19,532 INFO L226 Difference]: Without dead ends: 76 [2020-10-23 17:58:19,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=191, Invalid=2259, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 17:58:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-23 17:58:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2020-10-23 17:58:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 17:58:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-23 17:58:19,545 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 73 [2020-10-23 17:58:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:19,545 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-23 17:58:19,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 17:58:19,545 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-23 17:58:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-23 17:58:19,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:19,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:19,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:19,760 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:19,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1922237798, now seen corresponding path program 4 times [2020-10-23 17:58:19,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:19,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960410823] [2020-10-23 17:58:19,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:19,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:19,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-23 17:58:20,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960410823] [2020-10-23 17:58:20,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347882635] [2020-10-23 17:58:20,887 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 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 17:58:20,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 17:58:20,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:20,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 88 conjunts are in the unsatisfiable core [2020-10-23 17:58:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:21,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:21,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-23 17:58:21,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:21,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 29 [2020-10-23 17:58:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265433095] [2020-10-23 17:58:21,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-23 17:58:21,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:21,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-23 17:58:21,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2020-10-23 17:58:21,324 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 29 states. [2020-10-23 17:58:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:24,120 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-23 17:58:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 17:58:24,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 80 [2020-10-23 17:58:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:24,123 INFO L225 Difference]: With dead ends: 87 [2020-10-23 17:58:24,123 INFO L226 Difference]: Without dead ends: 82 [2020-10-23 17:58:24,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 17:58:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-23 17:58:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-10-23 17:58:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 17:58:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-23 17:58:24,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 80 [2020-10-23 17:58:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:24,134 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-23 17:58:24,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-23 17:58:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-23 17:58:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-23 17:58:24,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:24,135 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:24,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-23 17:58:24,350 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:24,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2071918507, now seen corresponding path program 5 times [2020-10-23 17:58:24,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:24,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27406713] [2020-10-23 17:58:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:24,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-23 17:58:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27406713] [2020-10-23 17:58:25,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320371866] [2020-10-23 17:58:25,563 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 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 17:58:25,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 17:58:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 96 conjunts are in the unsatisfiable core [2020-10-23 17:58:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:25,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:25,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-10-23 17:58:26,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:26,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 32 [2020-10-23 17:58:26,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191122099] [2020-10-23 17:58:26,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 17:58:26,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:26,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 17:58:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-10-23 17:58:26,101 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 32 states. [2020-10-23 17:58:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:29,203 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-23 17:58:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-23 17:58:29,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-10-23 17:58:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:29,207 INFO L225 Difference]: With dead ends: 93 [2020-10-23 17:58:29,207 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 17:58:29,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=223, Invalid=3083, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 17:58:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 17:58:29,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2020-10-23 17:58:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 17:58:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-23 17:58:29,224 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 87 [2020-10-23 17:58:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:29,227 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-23 17:58:29,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 17:58:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-23 17:58:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-23 17:58:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:29,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:29,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:29,432 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1811964441, now seen corresponding path program 5 times [2020-10-23 17:58:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:29,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207492061] [2020-10-23 17:58:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:29,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-23 17:58:30,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207492061] [2020-10-23 17:58:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710334648] [2020-10-23 17:58:30,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:30,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-23 17:58:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 104 conjunts are in the unsatisfiable core [2020-10-23 17:58:30,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:31,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:31,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-23 17:58:31,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:31,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 34 [2020-10-23 17:58:31,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815677267] [2020-10-23 17:58:31,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 17:58:31,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 17:58:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 17:58:31,355 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 34 states. [2020-10-23 17:58:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:34,946 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-23 17:58:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 17:58:34,946 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 94 [2020-10-23 17:58:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:34,948 INFO L225 Difference]: With dead ends: 99 [2020-10-23 17:58:34,948 INFO L226 Difference]: Without dead ends: 94 [2020-10-23 17:58:34,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=238, Invalid=3544, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 17:58:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-23 17:58:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2020-10-23 17:58:34,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-23 17:58:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-23 17:58:34,957 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 94 [2020-10-23 17:58:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:34,957 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-23 17:58:34,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 17:58:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-23 17:58:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-23 17:58:34,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:34,959 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:35,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-23 17:58:35,164 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:35,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:35,165 INFO L82 PathProgramCache]: Analyzing trace with hash -527580404, now seen corresponding path program 6 times [2020-10-23 17:58:35,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242608120] [2020-10-23 17:58:35,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:35,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-10-23 17:58:36,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242608120] [2020-10-23 17:58:36,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425890654] [2020-10-23 17:58:36,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:36,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 17:58:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 112 conjunts are in the unsatisfiable core [2020-10-23 17:58:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:37,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:37,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-10-23 17:58:37,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:37,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 36 [2020-10-23 17:58:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977663432] [2020-10-23 17:58:37,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 17:58:37,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 17:58:37,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1184, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 17:58:37,344 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 36 states. [2020-10-23 17:58:41,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:41,208 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-23 17:58:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 17:58:41,210 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2020-10-23 17:58:41,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:41,212 INFO L225 Difference]: With dead ends: 105 [2020-10-23 17:58:41,212 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 17:58:41,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=255, Invalid=4035, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 17:58:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 17:58:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 65. [2020-10-23 17:58:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 17:58:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-23 17:58:41,222 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 101 [2020-10-23 17:58:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:41,223 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-23 17:58:41,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 17:58:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-23 17:58:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-23 17:58:41,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:41,224 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:41,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-23 17:58:41,439 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:41,439 INFO L82 PathProgramCache]: Analyzing trace with hash -204163892, now seen corresponding path program 6 times [2020-10-23 17:58:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:41,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874879221] [2020-10-23 17:58:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:41,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:42,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-23 17:58:43,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874879221] [2020-10-23 17:58:43,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567310825] [2020-10-23 17:58:43,037 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 17:58:43,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-23 17:58:43,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:58:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 120 conjunts are in the unsatisfiable core [2020-10-23 17:58:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:43,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:43,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-23 17:58:43,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:43,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 37 [2020-10-23 17:58:43,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238082477] [2020-10-23 17:58:43,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-23 17:58:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-23 17:58:43,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 17:58:43,580 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 37 states. [2020-10-23 17:58:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:48,119 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2020-10-23 17:58:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-23 17:58:48,119 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 108 [2020-10-23 17:58:48,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:48,122 INFO L225 Difference]: With dead ends: 111 [2020-10-23 17:58:48,122 INFO L226 Difference]: Without dead ends: 106 [2020-10-23 17:58:48,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=263, Invalid=4429, Unknown=0, NotChecked=0, Total=4692 [2020-10-23 17:58:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-23 17:58:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2020-10-23 17:58:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 17:58:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-23 17:58:48,132 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 108 [2020-10-23 17:58:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:48,132 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-23 17:58:48,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-23 17:58:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-23 17:58:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-23 17:58:48,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:48,134 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:48,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-23 17:58:48,346 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:48,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:48,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1047105171, now seen corresponding path program 7 times [2020-10-23 17:58:48,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:48,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897803141] [2020-10-23 17:58:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:48,536 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 17:58:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:48,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:48,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:49,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:50,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-23 17:58:50,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897803141] [2020-10-23 17:58:50,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485318606] [2020-10-23 17:58:50,520 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 17:58:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 128 conjunts are in the unsatisfiable core [2020-10-23 17:58:50,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:50,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:50,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-23 17:58:51,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:51,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 40 [2020-10-23 17:58:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581523763] [2020-10-23 17:58:51,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 17:58:51,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 17:58:51,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1476, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 17:58:51,266 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 40 states. [2020-10-23 17:58:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:58:56,196 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-23 17:58:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 17:58:56,197 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2020-10-23 17:58:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:58:56,199 INFO L225 Difference]: With dead ends: 117 [2020-10-23 17:58:56,199 INFO L226 Difference]: Without dead ends: 112 [2020-10-23 17:58:56,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=287, Invalid=5115, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 17:58:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-23 17:58:56,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2020-10-23 17:58:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 17:58:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-23 17:58:56,211 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 115 [2020-10-23 17:58:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:58:56,211 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-23 17:58:56,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 17:58:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-23 17:58:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-23 17:58:56,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:58:56,213 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:58:56,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-23 17:58:56,421 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:58:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:58:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1580462721, now seen corresponding path program 7 times [2020-10-23 17:58:56,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:58:56,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752488037] [2020-10-23 17:58:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:58:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:58:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:58:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:56,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:57,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:58,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:58,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:58:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-23 17:58:58,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752488037] [2020-10-23 17:58:58,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211366745] [2020-10-23 17:58:58,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:58:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:58:58,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 136 conjunts are in the unsatisfiable core [2020-10-23 17:58:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:58:58,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:58,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:58:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-10-23 17:58:59,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:58:59,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 42 [2020-10-23 17:58:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989971742] [2020-10-23 17:58:59,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 17:58:59,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:58:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 17:58:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1635, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 17:58:59,092 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 42 states. [2020-10-23 17:59:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:04,560 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2020-10-23 17:59:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-23 17:59:04,560 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 122 [2020-10-23 17:59:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:04,562 INFO L225 Difference]: With dead ends: 123 [2020-10-23 17:59:04,562 INFO L226 Difference]: Without dead ends: 118 [2020-10-23 17:59:04,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=302, Invalid=5704, Unknown=0, NotChecked=0, Total=6006 [2020-10-23 17:59:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-23 17:59:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-23 17:59:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-23 17:59:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-23 17:59:04,572 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 122 [2020-10-23 17:59:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:04,572 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-23 17:59:04,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 17:59:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-23 17:59:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-23 17:59:04,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:04,573 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:04,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:04,787 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2100022578, now seen corresponding path program 8 times [2020-10-23 17:59:04,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:04,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366981877] [2020-10-23 17:59:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:05,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:06,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-23 17:59:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366981877] [2020-10-23 17:59:07,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828193644] [2020-10-23 17:59:07,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:07,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:59:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:59:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 144 conjunts are in the unsatisfiable core [2020-10-23 17:59:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:07,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:07,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-10-23 17:59:07,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:59:07,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 44 [2020-10-23 17:59:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807640971] [2020-10-23 17:59:07,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 17:59:07,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 17:59:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1800, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 17:59:07,773 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 44 states. [2020-10-23 17:59:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:13,868 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2020-10-23 17:59:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-23 17:59:13,870 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 129 [2020-10-23 17:59:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:13,872 INFO L225 Difference]: With dead ends: 129 [2020-10-23 17:59:13,872 INFO L226 Difference]: Without dead ends: 124 [2020-10-23 17:59:13,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=319, Invalid=6323, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 17:59:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-23 17:59:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2020-10-23 17:59:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-23 17:59:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-23 17:59:13,881 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 129 [2020-10-23 17:59:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:13,882 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-23 17:59:13,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 17:59:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-23 17:59:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-23 17:59:13,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:13,883 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:14,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:14,094 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1796897842, now seen corresponding path program 8 times [2020-10-23 17:59:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:14,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061896610] [2020-10-23 17:59:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:14,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:15,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:16,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:16,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-10-23 17:59:16,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061896610] [2020-10-23 17:59:16,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871445319] [2020-10-23 17:59:16,554 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 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 17:59:16,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:59:16,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:59:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 152 conjunts are in the unsatisfiable core [2020-10-23 17:59:16,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:16,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:16,951 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-10-23 17:59:17,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:59:17,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 45 [2020-10-23 17:59:17,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036692804] [2020-10-23 17:59:17,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-23 17:59:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-23 17:59:17,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1890, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 17:59:17,240 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 45 states. [2020-10-23 17:59:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:23,835 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-10-23 17:59:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 17:59:23,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 136 [2020-10-23 17:59:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:23,837 INFO L225 Difference]: With dead ends: 135 [2020-10-23 17:59:23,837 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 17:59:23,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=326, Invalid=6814, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 17:59:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 17:59:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2020-10-23 17:59:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 17:59:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-23 17:59:23,846 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 136 [2020-10-23 17:59:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-23 17:59:23,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-23 17:59:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-23 17:59:23,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-23 17:59:23,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:23,848 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:24,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:24,060 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1075459887, now seen corresponding path program 9 times [2020-10-23 17:59:24,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:24,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241203678] [2020-10-23 17:59:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,268 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 17:59:24,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:24,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:25,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:26,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:26,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:26,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:26,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-23 17:59:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241203678] [2020-10-23 17:59:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087384033] [2020-10-23 17:59:26,862 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 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 [2020-10-23 17:59:26,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 17:59:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:59:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 160 conjunts are in the unsatisfiable core [2020-10-23 17:59:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:27,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:27,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-23 17:59:27,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:59:27,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 48 [2020-10-23 17:59:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497716062] [2020-10-23 17:59:27,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 17:59:27,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 17:59:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2156, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 17:59:27,671 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 48 states. [2020-10-23 17:59:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:34,943 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2020-10-23 17:59:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 17:59:34,948 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 143 [2020-10-23 17:59:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:34,950 INFO L225 Difference]: With dead ends: 141 [2020-10-23 17:59:34,950 INFO L226 Difference]: Without dead ends: 136 [2020-10-23 17:59:34,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=351, Invalid=7659, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 17:59:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-23 17:59:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 83. [2020-10-23 17:59:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 17:59:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-23 17:59:34,959 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 143 [2020-10-23 17:59:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:34,960 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-23 17:59:34,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 17:59:34,960 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-23 17:59:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-23 17:59:34,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:34,961 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:35,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-23 17:59:35,175 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash -2123624219, now seen corresponding path program 9 times [2020-10-23 17:59:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:35,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592764774] [2020-10-23 17:59:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:35,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:36,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:37,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:38,182 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-23 17:59:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592764774] [2020-10-23 17:59:38,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715337762] [2020-10-23 17:59:38,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:38,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-23 17:59:38,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:59:38,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 168 conjunts are in the unsatisfiable core [2020-10-23 17:59:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:38,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:38,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-10-23 17:59:38,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:59:38,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 49 [2020-10-23 17:59:38,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147667154] [2020-10-23 17:59:38,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-23 17:59:38,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:38,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-23 17:59:38,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 17:59:38,871 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 49 states. [2020-10-23 17:59:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:59:46,845 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2020-10-23 17:59:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-23 17:59:46,846 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 150 [2020-10-23 17:59:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:59:46,847 INFO L225 Difference]: With dead ends: 147 [2020-10-23 17:59:46,847 INFO L226 Difference]: Without dead ends: 142 [2020-10-23 17:59:46,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=359, Invalid=8197, Unknown=0, NotChecked=0, Total=8556 [2020-10-23 17:59:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-23 17:59:46,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 86. [2020-10-23 17:59:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 17:59:46,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-23 17:59:46,856 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 150 [2020-10-23 17:59:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:59:46,856 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-23 17:59:46,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-23 17:59:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-23 17:59:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-23 17:59:46,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:59:46,858 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:59:47,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-23 17:59:47,062 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:59:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:59:47,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091824, now seen corresponding path program 10 times [2020-10-23 17:59:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:59:47,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292552260] [2020-10-23 17:59:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:59:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,263 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 17:59:47,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:59:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 17:59:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:47,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:48,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:49,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 17:59:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:59:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-23 17:59:50,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292552260] [2020-10-23 17:59:50,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031034754] [2020-10-23 17:59:50,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:59:50,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 17:59:50,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:59:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 176 conjunts are in the unsatisfiable core [2020-10-23 17:59:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:59:51,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:51,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 17:59:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-23 17:59:51,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:59:51,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 52 [2020-10-23 17:59:51,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630895143] [2020-10-23 17:59:51,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 17:59:51,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:59:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 17:59:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2544, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 17:59:51,497 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 52 states. [2020-10-23 18:00:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:00:00,006 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-23 18:00:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 18:00:00,007 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 157 [2020-10-23 18:00:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:00:00,009 INFO L225 Difference]: With dead ends: 153 [2020-10-23 18:00:00,009 INFO L226 Difference]: Without dead ends: 148 [2020-10-23 18:00:00,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=383, Invalid=9123, Unknown=0, NotChecked=0, Total=9506 [2020-10-23 18:00:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-23 18:00:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 89. [2020-10-23 18:00:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 18:00:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-23 18:00:00,017 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 157 [2020-10-23 18:00:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:00:00,018 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-23 18:00:00,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 18:00:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-23 18:00:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-23 18:00:00,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:00:00,019 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:00:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-23 18:00:00,231 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:00:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:00:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash 837082008, now seen corresponding path program 10 times [2020-10-23 18:00:00,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:00:00,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556259025] [2020-10-23 18:00:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:00:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:00:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:00:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:00,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:01,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:02,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:02,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:02,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:02,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:02,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:03,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-10-23 18:00:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556259025] [2020-10-23 18:00:03,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755554976] [2020-10-23 18:00:03,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:00:03,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:00:03,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:00:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 184 conjunts are in the unsatisfiable core [2020-10-23 18:00:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:00:04,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:04,295 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-10-23 18:00:04,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:00:04,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 53 [2020-10-23 18:00:04,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997787179] [2020-10-23 18:00:04,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-23 18:00:04,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:00:04,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-23 18:00:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2649, Unknown=0, NotChecked=0, Total=2756 [2020-10-23 18:00:04,714 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 53 states. [2020-10-23 18:00:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:00:14,089 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2020-10-23 18:00:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 18:00:14,089 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 164 [2020-10-23 18:00:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:00:14,091 INFO L225 Difference]: With dead ends: 159 [2020-10-23 18:00:14,091 INFO L226 Difference]: Without dead ends: 154 [2020-10-23 18:00:14,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=391, Invalid=9709, Unknown=0, NotChecked=0, Total=10100 [2020-10-23 18:00:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-23 18:00:14,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 92. [2020-10-23 18:00:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 18:00:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-23 18:00:14,100 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 164 [2020-10-23 18:00:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:00:14,101 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-23 18:00:14,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-23 18:00:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-23 18:00:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-23 18:00:14,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:00:14,102 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:00:14,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-23 18:00:14,317 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:00:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:00:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1912850673, now seen corresponding path program 11 times [2020-10-23 18:00:14,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:00:14,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235904788] [2020-10-23 18:00:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:00:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,543 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 18:00:14,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:00:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:00:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:14,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:15,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:16,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:16,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:16,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:16,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:16,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:17,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:17,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:17,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:17,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:17,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-10-23 18:00:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235904788] [2020-10-23 18:00:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863924599] [2020-10-23 18:00:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:00:18,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:00:18,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:00:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 192 conjunts are in the unsatisfiable core [2020-10-23 18:00:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:00:18,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:18,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:19,432 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-10-23 18:00:19,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:00:19,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 56 [2020-10-23 18:00:19,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918477998] [2020-10-23 18:00:19,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 18:00:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:00:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 18:00:19,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2964, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 18:00:19,435 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 56 states. [2020-10-23 18:00:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:00:29,635 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2020-10-23 18:00:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-23 18:00:29,640 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 171 [2020-10-23 18:00:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:00:29,641 INFO L225 Difference]: With dead ends: 165 [2020-10-23 18:00:29,641 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 18:00:29,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=415, Invalid=10715, Unknown=0, NotChecked=0, Total=11130 [2020-10-23 18:00:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 18:00:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 95. [2020-10-23 18:00:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-23 18:00:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-23 18:00:29,650 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 171 [2020-10-23 18:00:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:00:29,651 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-23 18:00:29,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 18:00:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-23 18:00:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-23 18:00:29,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:00:29,652 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:00:29,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-23 18:00:29,867 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:00:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:00:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1004475317, now seen corresponding path program 11 times [2020-10-23 18:00:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:00:29,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844709295] [2020-10-23 18:00:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:00:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:00:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:00:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:30,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:31,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:32,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:32,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:32,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:32,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:32,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:33,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:33,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:33,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-23 18:00:34,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844709295] [2020-10-23 18:00:34,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017779609] [2020-10-23 18:00:34,242 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:00:34,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-23 18:00:34,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:00:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 200 conjunts are in the unsatisfiable core [2020-10-23 18:00:34,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:00:34,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:34,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-23 18:00:35,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:00:35,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 58 [2020-10-23 18:00:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011847339] [2020-10-23 18:00:35,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 18:00:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:00:35,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 18:00:35,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3187, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 18:00:35,149 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 58 states. [2020-10-23 18:00:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:00:46,212 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-10-23 18:00:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 18:00:46,212 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 178 [2020-10-23 18:00:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:00:46,214 INFO L225 Difference]: With dead ends: 171 [2020-10-23 18:00:46,214 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 18:00:46,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=430, Invalid=11560, Unknown=0, NotChecked=0, Total=11990 [2020-10-23 18:00:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 18:00:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 98. [2020-10-23 18:00:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-23 18:00:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-23 18:00:46,222 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 178 [2020-10-23 18:00:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:00:46,223 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-23 18:00:46,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 18:00:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-23 18:00:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-23 18:00:46,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:00:46,224 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:00:46,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:00:46,434 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:00:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:00:46,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1363523154, now seen corresponding path program 12 times [2020-10-23 18:00:46,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:00:46,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28784932] [2020-10-23 18:00:46,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:00:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:46,652 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 18:00:46,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:00:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:46,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:00:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:46,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:46,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:46,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:47,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:48,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:49,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:49,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:49,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:49,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:49,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:50,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:50,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:00:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:00:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-10-23 18:00:51,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28784932] [2020-10-23 18:00:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785710154] [2020-10-23 18:00:51,205 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:00:51,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:00:51,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:00:51,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 208 conjunts are in the unsatisfiable core [2020-10-23 18:00:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:00:51,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:51,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:00:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2020-10-23 18:00:52,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:00:52,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 60 [2020-10-23 18:00:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711704138] [2020-10-23 18:00:52,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 18:00:52,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:00:52,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 18:00:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3416, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 18:00:52,308 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 60 states. [2020-10-23 18:01:04,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:01:04,439 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2020-10-23 18:01:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-23 18:01:04,443 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 185 [2020-10-23 18:01:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:01:04,445 INFO L225 Difference]: With dead ends: 177 [2020-10-23 18:01:04,445 INFO L226 Difference]: Without dead ends: 172 [2020-10-23 18:01:04,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=447, Invalid=12435, Unknown=0, NotChecked=0, Total=12882 [2020-10-23 18:01:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-23 18:01:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 101. [2020-10-23 18:01:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-23 18:01:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-23 18:01:04,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 185 [2020-10-23 18:01:04,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:01:04,454 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-23 18:01:04,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 18:01:04,454 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-23 18:01:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-23 18:01:04,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:01:04,456 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:01:04,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-23 18:01:04,670 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:01:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:01:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1496601342, now seen corresponding path program 12 times [2020-10-23 18:01:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:01:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446018389] [2020-10-23 18:01:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:01:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:04,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:01:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:04,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:01:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:04,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:05,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:06,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:07,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:07,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:07,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:07,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:08,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:08,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:08,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:09,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-23 18:01:09,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446018389] [2020-10-23 18:01:09,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941143803] [2020-10-23 18:01:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:01:09,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-23 18:01:09,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:01:09,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 216 conjunts are in the unsatisfiable core [2020-10-23 18:01:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:01:10,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:10,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-23 18:01:10,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:01:10,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 61 [2020-10-23 18:01:10,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15418124] [2020-10-23 18:01:10,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-23 18:01:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:01:10,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-23 18:01:10,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3537, Unknown=0, NotChecked=0, Total=3660 [2020-10-23 18:01:10,710 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 61 states. [2020-10-23 18:01:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:01:23,760 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2020-10-23 18:01:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-23 18:01:23,761 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 192 [2020-10-23 18:01:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:01:23,763 INFO L225 Difference]: With dead ends: 183 [2020-10-23 18:01:23,763 INFO L226 Difference]: Without dead ends: 178 [2020-10-23 18:01:23,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=455, Invalid=13117, Unknown=0, NotChecked=0, Total=13572 [2020-10-23 18:01:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-23 18:01:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 104. [2020-10-23 18:01:23,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-23 18:01:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-10-23 18:01:23,772 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 192 [2020-10-23 18:01:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:01:23,773 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-10-23 18:01:23,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-23 18:01:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-10-23 18:01:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-23 18:01:23,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:01:23,774 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:01:23,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-23 18:01:23,989 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:01:23,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:01:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -338909517, now seen corresponding path program 13 times [2020-10-23 18:01:23,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:01:23,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981267177] [2020-10-23 18:01:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:01:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,249 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 18:01:24,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:01:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:01:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:24,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:25,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:26,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:26,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:26,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:26,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:26,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:27,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:27,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:27,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:27,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:28,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:28,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:29,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-10-23 18:01:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981267177] [2020-10-23 18:01:29,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858030552] [2020-10-23 18:01:29,760 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:01:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:29,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 224 conjunts are in the unsatisfiable core [2020-10-23 18:01:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:01:30,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:30,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2020-10-23 18:01:30,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:01:30,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 64 [2020-10-23 18:01:30,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129496211] [2020-10-23 18:01:30,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 18:01:30,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:01:30,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 18:01:30,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=3900, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 18:01:30,890 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 64 states. [2020-10-23 18:01:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:01:44,974 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-10-23 18:01:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 18:01:44,975 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 199 [2020-10-23 18:01:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:01:44,978 INFO L225 Difference]: With dead ends: 189 [2020-10-23 18:01:44,978 INFO L226 Difference]: Without dead ends: 184 [2020-10-23 18:01:44,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=479, Invalid=14283, Unknown=0, NotChecked=0, Total=14762 [2020-10-23 18:01:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-23 18:01:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 107. [2020-10-23 18:01:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-23 18:01:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-23 18:01:44,988 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 199 [2020-10-23 18:01:44,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:01:44,989 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-23 18:01:44,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 18:01:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-23 18:01:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-23 18:01:44,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:01:44,990 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:01:45,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:01:45,204 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:01:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:01:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash -894754895, now seen corresponding path program 13 times [2020-10-23 18:01:45,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:01:45,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313234579] [2020-10-23 18:01:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:01:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:01:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:01:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:45,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:46,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:47,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:47,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:47,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:47,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:47,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:48,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:48,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:48,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:48,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:49,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:49,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:49,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:50,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:50,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:01:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-23 18:01:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313234579] [2020-10-23 18:01:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842070611] [2020-10-23 18:01:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:01:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:01:51,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 232 conjunts are in the unsatisfiable core [2020-10-23 18:01:51,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:01:51,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:51,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:01:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-23 18:01:52,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:01:52,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 65 [2020-10-23 18:01:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899444124] [2020-10-23 18:01:52,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-23 18:01:52,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:01:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-23 18:01:52,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4029, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 18:01:52,377 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 65 states. [2020-10-23 18:02:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:02:07,745 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2020-10-23 18:02:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-23 18:02:07,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 206 [2020-10-23 18:02:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:02:07,749 INFO L225 Difference]: With dead ends: 195 [2020-10-23 18:02:07,750 INFO L226 Difference]: Without dead ends: 190 [2020-10-23 18:02:07,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=487, Invalid=15013, Unknown=0, NotChecked=0, Total=15500 [2020-10-23 18:02:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-23 18:02:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 110. [2020-10-23 18:02:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-23 18:02:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-23 18:02:07,759 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 206 [2020-10-23 18:02:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:02:07,760 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-23 18:02:07,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-23 18:02:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-23 18:02:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-23 18:02:07,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:02:07,762 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:02:07,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:02:07,976 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:02:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:02:07,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1315162644, now seen corresponding path program 14 times [2020-10-23 18:02:07,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:02:07,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949054481] [2020-10-23 18:02:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:02:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,247 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 18:02:08,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:02:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:02:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:08,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:09,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:10,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:10,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:11,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:11,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:11,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:11,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:12,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:12,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:12,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:13,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:13,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:14,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-23 18:02:14,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949054481] [2020-10-23 18:02:14,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815664200] [2020-10-23 18:02:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:02:14,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:02:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:02:14,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 240 conjunts are in the unsatisfiable core [2020-10-23 18:02:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:02:15,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:02:15,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:02:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2020-10-23 18:02:16,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:02:16,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 68 [2020-10-23 18:02:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666644332] [2020-10-23 18:02:16,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-23 18:02:16,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:02:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-23 18:02:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4416, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 18:02:16,075 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 68 states. [2020-10-23 18:02:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:02:32,260 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2020-10-23 18:02:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-23 18:02:32,267 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 213 [2020-10-23 18:02:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:02:32,269 INFO L225 Difference]: With dead ends: 201 [2020-10-23 18:02:32,269 INFO L226 Difference]: Without dead ends: 196 [2020-10-23 18:02:32,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=511, Invalid=16259, Unknown=0, NotChecked=0, Total=16770 [2020-10-23 18:02:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-23 18:02:32,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 113. [2020-10-23 18:02:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-23 18:02:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2020-10-23 18:02:32,279 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 213 [2020-10-23 18:02:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:02:32,280 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2020-10-23 18:02:32,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-23 18:02:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2020-10-23 18:02:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-23 18:02:32,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:02:32,281 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:02:32,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-23 18:02:32,496 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:02:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:02:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1987485084, now seen corresponding path program 14 times [2020-10-23 18:02:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:02:32,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495348705] [2020-10-23 18:02:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:02:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:32,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:02:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:32,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:02:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:32,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:32,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:33,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:34,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:34,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:34,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:35,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:35,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:35,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:35,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:35,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:36,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:36,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:37,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:37,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:37,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:38,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:38,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:38,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-23 18:02:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495348705] [2020-10-23 18:02:39,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906423093] [2020-10-23 18:02:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:02:39,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:02:39,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:02:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 248 conjunts are in the unsatisfiable core [2020-10-23 18:02:39,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:02:40,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:02:40,384 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:02:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2020-10-23 18:02:40,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:02:40,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66] total 70 [2020-10-23 18:02:40,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353866999] [2020-10-23 18:02:40,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-23 18:02:40,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:02:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-23 18:02:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=4687, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 18:02:40,869 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 70 states. [2020-10-23 18:02:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:02:58,142 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-10-23 18:02:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-23 18:02:58,142 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 220 [2020-10-23 18:02:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:02:58,143 INFO L225 Difference]: With dead ends: 207 [2020-10-23 18:02:58,143 INFO L226 Difference]: Without dead ends: 202 [2020-10-23 18:02:58,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2271 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=526, Invalid=17296, Unknown=0, NotChecked=0, Total=17822 [2020-10-23 18:02:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-23 18:02:58,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 116. [2020-10-23 18:02:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-23 18:02:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2020-10-23 18:02:58,152 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 220 [2020-10-23 18:02:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:02:58,153 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2020-10-23 18:02:58,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-23 18:02:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2020-10-23 18:02:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-23 18:02:58,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:02:58,155 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:02:58,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:02:58,368 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:02:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:02:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -76656523, now seen corresponding path program 15 times [2020-10-23 18:02:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:02:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603397620] [2020-10-23 18:02:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:02:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:58,696 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 18:02:58,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:02:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:58,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:02:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:58,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:02:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:02:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:00,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:00,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:00,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:01,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:01,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:01,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:01,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:01,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:02,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:02,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:03,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:03,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:03,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:04,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:04,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:05,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-10-23 18:03:06,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603397620] [2020-10-23 18:03:06,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95485276] [2020-10-23 18:03:06,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:03:06,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:03:06,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:03:06,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 256 conjunts are in the unsatisfiable core [2020-10-23 18:03:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:03:07,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:03:07,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:03:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-10-23 18:03:08,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:03:08,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 72 [2020-10-23 18:03:08,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467984485] [2020-10-23 18:03:08,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-23 18:03:08,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:03:08,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-23 18:03:08,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=4964, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 18:03:08,026 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 72 states. [2020-10-23 18:03:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:03:26,731 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2020-10-23 18:03:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 18:03:26,733 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 227 [2020-10-23 18:03:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:03:26,735 INFO L225 Difference]: With dead ends: 213 [2020-10-23 18:03:26,735 INFO L226 Difference]: Without dead ends: 208 [2020-10-23 18:03:26,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 284 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=543, Invalid=18363, Unknown=0, NotChecked=0, Total=18906 [2020-10-23 18:03:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-23 18:03:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 119. [2020-10-23 18:03:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 18:03:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-23 18:03:26,747 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 227 [2020-10-23 18:03:26,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:03:26,747 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-23 18:03:26,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-23 18:03:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-23 18:03:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-23 18:03:26,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:03:26,749 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:03:26,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-23 18:03:26,957 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:03:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:03:26,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2102078231, now seen corresponding path program 15 times [2020-10-23 18:03:26,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:03:26,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983084981] [2020-10-23 18:03:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:03:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:03:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:03:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:27,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:28,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:28,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:28,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:28,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:29,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:29,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:30,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:30,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:30,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:31,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:31,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:31,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:32,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:32,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:32,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:33,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:34,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:34,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:34,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-10-23 18:03:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983084981] [2020-10-23 18:03:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585098965] [2020-10-23 18:03:35,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:03:35,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-23 18:03:35,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:03:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 264 conjunts are in the unsatisfiable core [2020-10-23 18:03:35,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:03:36,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:03:36,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:03:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2020-10-23 18:03:36,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:03:36,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 73 [2020-10-23 18:03:36,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074960253] [2020-10-23 18:03:36,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-23 18:03:36,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:03:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-23 18:03:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5109, Unknown=0, NotChecked=0, Total=5256 [2020-10-23 18:03:36,918 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 73 states. [2020-10-23 18:03:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:03:57,493 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2020-10-23 18:03:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-23 18:03:57,493 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 234 [2020-10-23 18:03:57,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:03:57,495 INFO L225 Difference]: With dead ends: 219 [2020-10-23 18:03:57,496 INFO L226 Difference]: Without dead ends: 214 [2020-10-23 18:03:57,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=551, Invalid=19189, Unknown=0, NotChecked=0, Total=19740 [2020-10-23 18:03:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-23 18:03:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 122. [2020-10-23 18:03:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-23 18:03:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-23 18:03:57,505 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 234 [2020-10-23 18:03:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:03:57,505 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-23 18:03:57,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-23 18:03:57,506 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-23 18:03:57,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-23 18:03:57,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:03:57,507 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:03:57,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:03:57,721 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:03:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:03:57,721 INFO L82 PathProgramCache]: Analyzing trace with hash -538482218, now seen corresponding path program 16 times [2020-10-23 18:03:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:03:57,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428326625] [2020-10-23 18:03:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:03:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,002 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 18:03:58,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:03:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:03:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:58,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:59,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:03:59,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:03:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:00,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:00,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:00,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:01,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:01,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:01,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:02,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:02,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:02,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:03,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:03,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:04,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:04,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:04,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:05,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-23 18:04:07,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428326625] [2020-10-23 18:04:07,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193893412] [2020-10-23 18:04:07,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:04:07,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:04:07,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:04:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 272 conjunts are in the unsatisfiable core [2020-10-23 18:04:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:04:08,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:04:08,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:04:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-23 18:04:09,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:04:09,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 76 [2020-10-23 18:04:09,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476350073] [2020-10-23 18:04:09,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-23 18:04:09,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:04:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-23 18:04:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=5544, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 18:04:09,074 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 76 states. [2020-10-23 18:04:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:04:30,761 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2020-10-23 18:04:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-23 18:04:30,763 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 241 [2020-10-23 18:04:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:04:30,766 INFO L225 Difference]: With dead ends: 225 [2020-10-23 18:04:30,766 INFO L226 Difference]: Without dead ends: 220 [2020-10-23 18:04:30,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=575, Invalid=20595, Unknown=0, NotChecked=0, Total=21170 [2020-10-23 18:04:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-23 18:04:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 125. [2020-10-23 18:04:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-23 18:04:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2020-10-23 18:04:30,774 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 241 [2020-10-23 18:04:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:04:30,775 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2020-10-23 18:04:30,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-23 18:04:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2020-10-23 18:04:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-23 18:04:30,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:04:30,777 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:04:30,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-23 18:04:30,986 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:04:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:04:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash -488338998, now seen corresponding path program 16 times [2020-10-23 18:04:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:04:30,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406977229] [2020-10-23 18:04:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:04:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:04:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:04:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:31,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:32,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:32,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:32,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:32,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:32,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:33,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:33,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:33,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:33,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:34,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:34,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:34,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:35,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:35,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:35,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:36,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:37,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:37,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:37,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:38,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:38,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:39,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:39,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:04:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:04:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-10-23 18:04:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406977229] [2020-10-23 18:04:41,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753985427] [2020-10-23 18:04:41,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:04:41,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:04:41,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:04:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 280 conjunts are in the unsatisfiable core [2020-10-23 18:04:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:04:41,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:04:41,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:04:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2020-10-23 18:04:42,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:04:42,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 77 [2020-10-23 18:04:42,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130498119] [2020-10-23 18:04:42,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-23 18:04:42,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:04:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-23 18:04:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5698, Unknown=0, NotChecked=0, Total=5852 [2020-10-23 18:04:42,535 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 77 states. [2020-10-23 18:05:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:05:05,928 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2020-10-23 18:05:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-23 18:05:05,928 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 248 [2020-10-23 18:05:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:05:05,931 INFO L225 Difference]: With dead ends: 231 [2020-10-23 18:05:05,931 INFO L226 Difference]: Without dead ends: 226 [2020-10-23 18:05:05,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=582, Invalid=21470, Unknown=0, NotChecked=0, Total=22052 [2020-10-23 18:05:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-23 18:05:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 128. [2020-10-23 18:05:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-23 18:05:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2020-10-23 18:05:05,941 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 248 [2020-10-23 18:05:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:05:05,941 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2020-10-23 18:05:05,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-23 18:05:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2020-10-23 18:05:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-23 18:05:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:05:05,943 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:05:06,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-23 18:05:06,157 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:05:06,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:05:06,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1214400055, now seen corresponding path program 17 times [2020-10-23 18:05:06,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:05:06,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953079603] [2020-10-23 18:05:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:05:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:06,462 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 18 [2020-10-23 18:05:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:05:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:05:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:06,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:06,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:07,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:08,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:08,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:08,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:08,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:09,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:09,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:09,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:10,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:10,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:10,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:11,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:12,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:12,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:12,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:13,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:13,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:13,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:14,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:14,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:15,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:15,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:15,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-10-23 18:05:17,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953079603] [2020-10-23 18:05:17,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047680096] [2020-10-23 18:05:17,346 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:05:17,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:05:17,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:05:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 288 conjunts are in the unsatisfiable core [2020-10-23 18:05:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:05:18,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:05:18,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:05:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2020-10-23 18:05:19,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:05:19,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76] total 80 [2020-10-23 18:05:19,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264010315] [2020-10-23 18:05:19,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-23 18:05:19,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:05:19,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-23 18:05:19,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6156, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 18:05:19,113 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 80 states. [2020-10-23 18:05:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:05:44,283 INFO L93 Difference]: Finished difference Result 237 states and 239 transitions. [2020-10-23 18:05:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-23 18:05:44,289 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 255 [2020-10-23 18:05:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:05:44,291 INFO L225 Difference]: With dead ends: 237 [2020-10-23 18:05:44,291 INFO L226 Difference]: Without dead ends: 232 [2020-10-23 18:05:44,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 320 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=607, Invalid=22955, Unknown=0, NotChecked=0, Total=23562 [2020-10-23 18:05:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-23 18:05:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 131. [2020-10-23 18:05:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-23 18:05:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-23 18:05:44,300 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 255 [2020-10-23 18:05:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:05:44,300 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-23 18:05:44,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-23 18:05:44,301 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-23 18:05:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-23 18:05:44,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:05:44,303 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:05:44,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-23 18:05:44,504 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:05:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:05:44,504 INFO L82 PathProgramCache]: Analyzing trace with hash 734105213, now seen corresponding path program 17 times [2020-10-23 18:05:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:05:44,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889084153] [2020-10-23 18:05:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:05:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:05:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:44,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:05:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:44,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:45,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:45,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:45,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:45,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:45,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:45,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:46,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:46,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:46,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:46,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:46,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:47,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:47,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:47,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:48,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:48,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:48,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:48,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:49,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:49,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:49,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:50,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:50,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:50,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:51,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:51,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:51,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:52,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:53,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:53,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:54,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:54,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:54,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:05:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:05:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-10-23 18:05:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889084153] [2020-10-23 18:05:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727721878] [2020-10-23 18:05:56,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:05:56,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-23 18:05:56,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:05:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 296 conjunts are in the unsatisfiable core [2020-10-23 18:05:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:05:57,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:05:57,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:05:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2020-10-23 18:05:58,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:05:58,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 82 [2020-10-23 18:05:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123720205] [2020-10-23 18:05:58,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-23 18:05:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:05:58,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-23 18:05:58,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6475, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 18:05:58,059 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 82 states. [2020-10-23 18:06:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:06:25,893 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-10-23 18:06:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 18:06:25,893 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 262 [2020-10-23 18:06:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:06:25,894 INFO L225 Difference]: With dead ends: 243 [2020-10-23 18:06:25,894 INFO L226 Difference]: Without dead ends: 238 [2020-10-23 18:06:25,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3153 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=622, Invalid=24184, Unknown=0, NotChecked=0, Total=24806 [2020-10-23 18:06:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-23 18:06:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 134. [2020-10-23 18:06:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-23 18:06:25,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-23 18:06:25,903 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 262 [2020-10-23 18:06:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:06:25,904 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-23 18:06:25,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-23 18:06:25,904 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-23 18:06:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-23 18:06:25,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:06:25,906 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:06:26,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-23 18:06:26,119 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:06:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:06:26,120 INFO L82 PathProgramCache]: Analyzing trace with hash -703982184, now seen corresponding path program 18 times [2020-10-23 18:06:26,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:06:26,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724809641] [2020-10-23 18:06:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:06:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:26,417 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 18:06:26,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:06:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:26,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:06:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:26,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:26,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:26,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:28,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:28,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:28,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:28,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:29,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:29,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:29,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:30,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:30,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:30,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:31,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:32,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:32,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:32,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:33,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:33,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:34,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:34,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:34,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:35,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:35,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:36,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:36,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:06:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:06:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-10-23 18:06:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724809641] [2020-10-23 18:06:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001997950] [2020-10-23 18:06:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:06:38,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:06:38,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:06:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 304 conjunts are in the unsatisfiable core [2020-10-23 18:06:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:06:39,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:06:39,990 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:06:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-10-23 18:06:40,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:06:40,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 84 [2020-10-23 18:06:40,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623798291] [2020-10-23 18:06:40,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-23 18:06:40,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:06:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-23 18:06:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6800, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 18:06:40,858 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 84 states. [2020-10-23 18:07:10,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:07:10,581 INFO L93 Difference]: Finished difference Result 249 states and 251 transitions. [2020-10-23 18:07:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-23 18:07:10,583 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 269 [2020-10-23 18:07:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:07:10,584 INFO L225 Difference]: With dead ends: 249 [2020-10-23 18:07:10,585 INFO L226 Difference]: Without dead ends: 244 [2020-10-23 18:07:10,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=639, Invalid=25443, Unknown=0, NotChecked=0, Total=26082 [2020-10-23 18:07:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-23 18:07:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 137. [2020-10-23 18:07:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-23 18:07:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2020-10-23 18:07:10,595 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 269 [2020-10-23 18:07:10,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:07:10,596 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2020-10-23 18:07:10,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-23 18:07:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2020-10-23 18:07:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-10-23 18:07:10,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:07:10,598 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:07:10,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-23 18:07:10,812 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:07:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:07:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash -590984912, now seen corresponding path program 18 times [2020-10-23 18:07:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:07:10,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804117670] [2020-10-23 18:07:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:07:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:07:11,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:07:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:11,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:12,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:12,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:12,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:12,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:12,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:13,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:13,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:13,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:14,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:14,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:14,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:14,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:15,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:15,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:16,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:16,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:17,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:17,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:18,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:18,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:19,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:19,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:20,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:20,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:21,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:21,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:22,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:07:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:07:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-23 18:07:24,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804117670] [2020-10-23 18:07:24,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773989922] [2020-10-23 18:07:24,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:07:24,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-23 18:07:24,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:07:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 312 conjunts are in the unsatisfiable core [2020-10-23 18:07:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:07:25,471 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:07:25,473 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:07:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-23 18:07:26,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:07:26,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82] total 86 [2020-10-23 18:07:26,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577104906] [2020-10-23 18:07:26,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-23 18:07:26,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:07:26,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-23 18:07:26,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7135, Unknown=0, NotChecked=0, Total=7310 [2020-10-23 18:07:26,289 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 86 states. [2020-10-23 18:07:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:07:59,532 INFO L93 Difference]: Finished difference Result 255 states and 257 transitions. [2020-10-23 18:07:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-23 18:07:59,532 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 276 [2020-10-23 18:07:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:07:59,535 INFO L225 Difference]: With dead ends: 255 [2020-10-23 18:07:59,535 INFO L226 Difference]: Without dead ends: 250 [2020-10-23 18:07:59,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=654, Invalid=26736, Unknown=0, NotChecked=0, Total=27390 [2020-10-23 18:07:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-23 18:07:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 140. [2020-10-23 18:07:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-23 18:07:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-10-23 18:07:59,546 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 276 [2020-10-23 18:07:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:07:59,546 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-10-23 18:07:59,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-23 18:07:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-10-23 18:07:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-23 18:07:59,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:07:59,548 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:07:59,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-23 18:07:59,763 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:07:59,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:07:59,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1939998713, now seen corresponding path program 19 times [2020-10-23 18:07:59,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:07:59,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316557215] [2020-10-23 18:07:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:07:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,100 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 18:08:00,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:08:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:08:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:00,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:01,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:01,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:01,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:02,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:02,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:02,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:02,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:03,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:03,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:04,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:04,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:04,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:05,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:06,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:06,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:06,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:07,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:08,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:08,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:08,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:08,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:09,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:09,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:10,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:10,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:11,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:11,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:12,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-10-23 18:08:14,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316557215] [2020-10-23 18:08:14,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947194367] [2020-10-23 18:08:14,722 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:08:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 320 conjunts are in the unsatisfiable core [2020-10-23 18:08:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:08:16,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:08:16,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:08:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2020-10-23 18:08:16,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:08:16,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84] total 88 [2020-10-23 18:08:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516551447] [2020-10-23 18:08:16,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-23 18:08:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:08:16,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-23 18:08:16,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=7476, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 18:08:16,887 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 88 states. [2020-10-23 18:08:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:08:52,315 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-10-23 18:08:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-23 18:08:52,317 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 283 [2020-10-23 18:08:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:08:52,320 INFO L225 Difference]: With dead ends: 261 [2020-10-23 18:08:52,321 INFO L226 Difference]: Without dead ends: 256 [2020-10-23 18:08:52,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 356 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=671, Invalid=28059, Unknown=0, NotChecked=0, Total=28730 [2020-10-23 18:08:52,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-23 18:08:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 143. [2020-10-23 18:08:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 18:08:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2020-10-23 18:08:52,332 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 283 [2020-10-23 18:08:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:08:52,332 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2020-10-23 18:08:52,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-23 18:08:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2020-10-23 18:08:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-23 18:08:52,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:08:52,335 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:08:52,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-23 18:08:52,550 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:08:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:08:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1833880035, now seen corresponding path program 19 times [2020-10-23 18:08:52,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:08:52,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75920516] [2020-10-23 18:08:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:08:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:52,817 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 9 [2020-10-23 18:08:52,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:08:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:52,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:08:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:53,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:54,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:54,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:54,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:54,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:54,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:55,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:55,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:56,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:56,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:57,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:58,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:58,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:59,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:08:59,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:08:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:00,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:00,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:01,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:01,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:02,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:02,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:03,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:04,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:05,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:05,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:06,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-10-23 18:09:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75920516] [2020-10-23 18:09:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885704372] [2020-10-23 18:09:08,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:09:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 328 conjunts are in the unsatisfiable core [2020-10-23 18:09:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:09:09,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:09:09,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:09:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2020-10-23 18:09:10,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:09:10,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 90 [2020-10-23 18:09:10,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409682333] [2020-10-23 18:09:10,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-23 18:09:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:09:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-23 18:09:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=7827, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 18:09:10,445 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 90 states. [2020-10-23 18:09:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:09:49,412 INFO L93 Difference]: Finished difference Result 267 states and 269 transitions. [2020-10-23 18:09:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-23 18:09:49,413 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 290 [2020-10-23 18:09:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:09:49,414 INFO L225 Difference]: With dead ends: 267 [2020-10-23 18:09:49,415 INFO L226 Difference]: Without dead ends: 262 [2020-10-23 18:09:49,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 366 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=686, Invalid=29416, Unknown=0, NotChecked=0, Total=30102 [2020-10-23 18:09:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-23 18:09:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 146. [2020-10-23 18:09:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-23 18:09:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-23 18:09:49,426 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 290 [2020-10-23 18:09:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:09:49,426 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-23 18:09:49,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-23 18:09:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-23 18:09:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-23 18:09:49,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:09:49,429 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:09:49,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:09:49,643 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:09:49,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:09:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1250250074, now seen corresponding path program 20 times [2020-10-23 18:09:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:09:49,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857679470] [2020-10-23 18:09:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:09:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,045 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-10-23 18:09:50,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:09:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-23 18:09:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:50,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:51,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:51,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:51,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:51,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:52,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:52,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:52,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:52,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:53,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:53,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:53,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:54,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:54,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:54,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:55,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:55,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:55,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:56,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:56,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:57,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:58,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:58,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:09:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:09:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:00,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:00,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:01,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:01,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:02,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:03,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:04,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:05,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:10:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:10:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-10-23 18:10:07,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857679470] [2020-10-23 18:10:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435045233] [2020-10-23 18:10:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:10:07,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:10:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:10:07,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 336 conjunts are in the unsatisfiable core [2020-10-23 18:10:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:10:08,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:10:08,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-23 18:10:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-10-23 18:10:09,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:10:09,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88] total 92 [2020-10-23 18:10:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431430306] [2020-10-23 18:10:09,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-23 18:10:09,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:10:09,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-23 18:10:09,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8184, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 18:10:09,677 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 92 states.