/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:13:55,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:13:55,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:13:55,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:13:55,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:13:55,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:13:55,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:13:55,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:13:55,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:13:55,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:13:55,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:13:55,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:13:55,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:13:55,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:13:55,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:13:55,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:13:55,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:13:55,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:13:55,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:13:55,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:13:55,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:13:55,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:13:55,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:13:55,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:13:55,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:13:55,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:13:55,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:13:55,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:13:55,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:13:55,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:13:55,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:13:55,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:13:55,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:13:55,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:13:55,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:13:55,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:13:55,151 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 [2019-11-06 22:13:55,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:13:55,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:13:55,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:13:55,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:13:55,172 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:13:55,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:13:55,173 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:13:55,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:13:55,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:13:55,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:13:55,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:13:55,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:13:55,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:13:55,175 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:13:55,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:13:55,176 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:13:55,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:13:55,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:13:55,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:13:55,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:13:55,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:13:55,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:55,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:13:55,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:13:55,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:13:55,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:13:55,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:13:55,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:13:55,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:13:55,471 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:13:55,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:13:55,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:13:55,494 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:13:55,494 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:13:55,495 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:55,564 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992a1890d/c3d27fb6e3bc463796a79e56a4f7c0dc/FLAG5a14cdb15 [2019-11-06 22:13:56,086 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:13:56,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:56,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992a1890d/c3d27fb6e3bc463796a79e56a4f7c0dc/FLAG5a14cdb15 [2019-11-06 22:13:56,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992a1890d/c3d27fb6e3bc463796a79e56a4f7c0dc [2019-11-06 22:13:56,387 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:13:56,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:13:56,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:56,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:13:56,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:13:56,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:56" (1/1) ... [2019-11-06 22:13:56,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180aee62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:56, skipping insertion in model container [2019-11-06 22:13:56,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:56" (1/1) ... [2019-11-06 22:13:56,406 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:13:56,479 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:13:56,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:56,948 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:13:57,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:57,063 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:13:57,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57 WrapperNode [2019-11-06 22:13:57,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:57,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:13:57,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:13:57,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:13:57,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (1/1) ... [2019-11-06 22:13:57,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:13:57,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:13:57,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:13:57,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:13:57,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (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 [2019-11-06 22:13:57,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:13:57,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:13:57,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:13:57,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:13:57,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:13:57,190 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:13:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:13:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:13:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:13:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:13:57,191 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:13:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:13:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:13:57,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:13:58,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:13:58,039 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:13:58,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:58 BoogieIcfgContainer [2019-11-06 22:13:58,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:13:58,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:13:58,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:13:58,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:13:58,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:56" (1/3) ... [2019-11-06 22:13:58,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b055f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:58, skipping insertion in model container [2019-11-06 22:13:58,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:57" (2/3) ... [2019-11-06 22:13:58,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b055f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:58, skipping insertion in model container [2019-11-06 22:13:58,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:58" (3/3) ... [2019-11-06 22:13:58,056 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:58,066 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:13:58,090 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:13:58,108 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:13:58,142 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:13:58,142 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:13:58,143 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:13:58,143 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:13:58,143 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:13:58,143 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:13:58,143 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:13:58,144 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:13:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2019-11-06 22:13:58,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 22:13:58,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:58,175 INFO L410 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, 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, 1, 1] [2019-11-06 22:13:58,176 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -276696918, now seen corresponding path program 1 times [2019-11-06 22:13:58,187 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:58,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220515784] [2019-11-06 22:13:58,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,774 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-11-06 22:13:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:58,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220515784] [2019-11-06 22:13:58,834 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:58,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:13:58,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293033642] [2019-11-06 22:13:58,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:13:58,846 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:13:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:13:58,860 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 7 states. [2019-11-06 22:13:59,053 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-06 22:14:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:00,139 INFO L93 Difference]: Finished difference Result 721 states and 1142 transitions. [2019-11-06 22:14:00,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 22:14:00,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2019-11-06 22:14:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:00,163 INFO L225 Difference]: With dead ends: 721 [2019-11-06 22:14:00,164 INFO L226 Difference]: Without dead ends: 630 [2019-11-06 22:14:00,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:14:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-11-06 22:14:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 423. [2019-11-06 22:14:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2019-11-06 22:14:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 647 transitions. [2019-11-06 22:14:00,273 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 647 transitions. Word has length 52 [2019-11-06 22:14:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:00,273 INFO L462 AbstractCegarLoop]: Abstraction has 423 states and 647 transitions. [2019-11-06 22:14:00,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:14:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 647 transitions. [2019-11-06 22:14:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:14:00,279 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:00,279 INFO L410 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, 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, 1, 1, 1, 1, 1] [2019-11-06 22:14:00,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:00,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1087729035, now seen corresponding path program 1 times [2019-11-06 22:14:00,281 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:00,281 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024323503] [2019-11-06 22:14:00,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:00,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024323503] [2019-11-06 22:14:00,521 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:00,522 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:00,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386469317] [2019-11-06 22:14:00,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:00,541 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:00,542 INFO L87 Difference]: Start difference. First operand 423 states and 647 transitions. Second operand 4 states. [2019-11-06 22:14:00,667 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2019-11-06 22:14:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:01,225 INFO L93 Difference]: Finished difference Result 1104 states and 1713 transitions. [2019-11-06 22:14:01,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:01,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:14:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:01,231 INFO L225 Difference]: With dead ends: 1104 [2019-11-06 22:14:01,231 INFO L226 Difference]: Without dead ends: 748 [2019-11-06 22:14:01,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-11-06 22:14:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2019-11-06 22:14:01,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-11-06 22:14:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1138 transitions. [2019-11-06 22:14:01,291 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1138 transitions. Word has length 55 [2019-11-06 22:14:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:01,291 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1138 transitions. [2019-11-06 22:14:01,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1138 transitions. [2019-11-06 22:14:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:14:01,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:01,294 INFO L410 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, 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, 1, 1, 1, 1, 1] [2019-11-06 22:14:01,295 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash 917757431, now seen corresponding path program 1 times [2019-11-06 22:14:01,295 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:01,296 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781050314] [2019-11-06 22:14:01,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:01,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781050314] [2019-11-06 22:14:01,479 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:01,479 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:01,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570724388] [2019-11-06 22:14:01,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:01,480 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:01,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:01,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:01,481 INFO L87 Difference]: Start difference. First operand 746 states and 1138 transitions. Second operand 4 states. [2019-11-06 22:14:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:02,145 INFO L93 Difference]: Finished difference Result 2006 states and 3079 transitions. [2019-11-06 22:14:02,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:02,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:14:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:02,153 INFO L225 Difference]: With dead ends: 2006 [2019-11-06 22:14:02,154 INFO L226 Difference]: Without dead ends: 1335 [2019-11-06 22:14:02,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2019-11-06 22:14:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1333. [2019-11-06 22:14:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-11-06 22:14:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2001 transitions. [2019-11-06 22:14:02,250 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2001 transitions. Word has length 55 [2019-11-06 22:14:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:02,251 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 2001 transitions. [2019-11-06 22:14:02,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2001 transitions. [2019-11-06 22:14:02,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:14:02,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:02,254 INFO L410 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:02,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash -41555275, now seen corresponding path program 1 times [2019-11-06 22:14:02,255 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:02,255 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440204712] [2019-11-06 22:14:02,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:02,617 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440204712] [2019-11-06 22:14:02,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:02,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 22:14:02,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749231762] [2019-11-06 22:14:02,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:14:02,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:14:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:14:02,620 INFO L87 Difference]: Start difference. First operand 1333 states and 2001 transitions. Second operand 11 states. [2019-11-06 22:14:02,783 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2019-11-06 22:14:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:05,750 INFO L93 Difference]: Finished difference Result 7842 states and 11792 transitions. [2019-11-06 22:14:05,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:14:05,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-11-06 22:14:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:05,793 INFO L225 Difference]: With dead ends: 7842 [2019-11-06 22:14:05,794 INFO L226 Difference]: Without dead ends: 7341 [2019-11-06 22:14:05,798 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2019-11-06 22:14:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2019-11-06 22:14:05,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 1358. [2019-11-06 22:14:05,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1358 states. [2019-11-06 22:14:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2033 transitions. [2019-11-06 22:14:05,965 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2033 transitions. Word has length 56 [2019-11-06 22:14:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:05,965 INFO L462 AbstractCegarLoop]: Abstraction has 1358 states and 2033 transitions. [2019-11-06 22:14:05,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:14:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2033 transitions. [2019-11-06 22:14:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 22:14:05,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:05,968 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:05,968 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -742667424, now seen corresponding path program 1 times [2019-11-06 22:14:05,969 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:05,969 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579558344] [2019-11-06 22:14:05,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:06,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579558344] [2019-11-06 22:14:06,186 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:06,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:14:06,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190518456] [2019-11-06 22:14:06,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:14:06,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:14:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:14:06,189 INFO L87 Difference]: Start difference. First operand 1358 states and 2033 transitions. Second operand 8 states. [2019-11-06 22:14:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:07,475 INFO L93 Difference]: Finished difference Result 5747 states and 8758 transitions. [2019-11-06 22:14:07,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:14:07,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-11-06 22:14:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:07,504 INFO L225 Difference]: With dead ends: 5747 [2019-11-06 22:14:07,504 INFO L226 Difference]: Without dead ends: 5246 [2019-11-06 22:14:07,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:14:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5246 states. [2019-11-06 22:14:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5246 to 1339. [2019-11-06 22:14:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-11-06 22:14:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2009 transitions. [2019-11-06 22:14:07,651 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2009 transitions. Word has length 57 [2019-11-06 22:14:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:07,652 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 2009 transitions. [2019-11-06 22:14:07,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:14:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2009 transitions. [2019-11-06 22:14:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 22:14:07,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:07,654 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:07,654 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:07,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1896016447, now seen corresponding path program 1 times [2019-11-06 22:14:07,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:07,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618646225] [2019-11-06 22:14:07,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:07,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618646225] [2019-11-06 22:14:07,892 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:07,893 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 22:14:07,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386677957] [2019-11-06 22:14:07,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:14:07,894 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:07,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:14:07,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:07,895 INFO L87 Difference]: Start difference. First operand 1339 states and 2009 transitions. Second operand 10 states. [2019-11-06 22:14:08,048 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-11-06 22:14:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:10,844 INFO L93 Difference]: Finished difference Result 8481 states and 12775 transitions. [2019-11-06 22:14:10,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:14:10,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2019-11-06 22:14:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:10,879 INFO L225 Difference]: With dead ends: 8481 [2019-11-06 22:14:10,879 INFO L226 Difference]: Without dead ends: 7351 [2019-11-06 22:14:10,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2019-11-06 22:14:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2019-11-06 22:14:11,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 1378. [2019-11-06 22:14:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2019-11-06 22:14:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2060 transitions. [2019-11-06 22:14:11,081 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2060 transitions. Word has length 57 [2019-11-06 22:14:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:11,082 INFO L462 AbstractCegarLoop]: Abstraction has 1378 states and 2060 transitions. [2019-11-06 22:14:11,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:14:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2060 transitions. [2019-11-06 22:14:11,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:14:11,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:11,084 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:11,085 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1439125625, now seen corresponding path program 1 times [2019-11-06 22:14:11,085 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:11,086 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985064509] [2019-11-06 22:14:11,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:11,329 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-11-06 22:14:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:11,347 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985064509] [2019-11-06 22:14:11,348 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:11,348 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:14:11,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280479644] [2019-11-06 22:14:11,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 22:14:11,349 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 22:14:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:14:11,350 INFO L87 Difference]: Start difference. First operand 1378 states and 2060 transitions. Second operand 8 states. [2019-11-06 22:14:11,506 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2019-11-06 22:14:12,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:12,671 INFO L93 Difference]: Finished difference Result 5650 states and 8490 transitions. [2019-11-06 22:14:12,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 22:14:12,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2019-11-06 22:14:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:12,689 INFO L225 Difference]: With dead ends: 5650 [2019-11-06 22:14:12,690 INFO L226 Difference]: Without dead ends: 4520 [2019-11-06 22:14:12,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-11-06 22:14:12,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2019-11-06 22:14:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 1359. [2019-11-06 22:14:12,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1359 states. [2019-11-06 22:14:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2033 transitions. [2019-11-06 22:14:12,879 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2033 transitions. Word has length 58 [2019-11-06 22:14:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:12,879 INFO L462 AbstractCegarLoop]: Abstraction has 1359 states and 2033 transitions. [2019-11-06 22:14:12,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 22:14:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2033 transitions. [2019-11-06 22:14:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:14:12,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:12,881 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:12,882 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:12,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:12,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1839206206, now seen corresponding path program 1 times [2019-11-06 22:14:12,882 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:12,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954310955] [2019-11-06 22:14:12,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:13,125 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954310955] [2019-11-06 22:14:13,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:13,126 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 22:14:13,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094202467] [2019-11-06 22:14:13,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:14:13,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:13,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:14:13,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:13,128 INFO L87 Difference]: Start difference. First operand 1359 states and 2033 transitions. Second operand 10 states. [2019-11-06 22:14:13,260 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-06 22:14:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:15,149 INFO L93 Difference]: Finished difference Result 7327 states and 11032 transitions. [2019-11-06 22:14:15,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:14:15,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2019-11-06 22:14:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:15,163 INFO L225 Difference]: With dead ends: 7327 [2019-11-06 22:14:15,163 INFO L226 Difference]: Without dead ends: 6095 [2019-11-06 22:14:15,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:14:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2019-11-06 22:14:15,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 3782. [2019-11-06 22:14:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3782 states. [2019-11-06 22:14:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 5672 transitions. [2019-11-06 22:14:15,581 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 5672 transitions. Word has length 58 [2019-11-06 22:14:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:15,581 INFO L462 AbstractCegarLoop]: Abstraction has 3782 states and 5672 transitions. [2019-11-06 22:14:15,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:14:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 5672 transitions. [2019-11-06 22:14:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 22:14:15,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:15,584 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:15,584 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1369199573, now seen corresponding path program 1 times [2019-11-06 22:14:15,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:15,585 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469666121] [2019-11-06 22:14:15,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:15,821 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469666121] [2019-11-06 22:14:15,821 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:15,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 22:14:15,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913717234] [2019-11-06 22:14:15,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:14:15,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:14:15,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:15,823 INFO L87 Difference]: Start difference. First operand 3782 states and 5672 transitions. Second operand 10 states. [2019-11-06 22:14:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:18,683 INFO L93 Difference]: Finished difference Result 19307 states and 28995 transitions. [2019-11-06 22:14:18,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:14:18,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2019-11-06 22:14:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:18,716 INFO L225 Difference]: With dead ends: 19307 [2019-11-06 22:14:18,716 INFO L226 Difference]: Without dead ends: 15977 [2019-11-06 22:14:18,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-11-06 22:14:18,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15977 states. [2019-11-06 22:14:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15977 to 11695. [2019-11-06 22:14:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11695 states. [2019-11-06 22:14:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11695 states to 11695 states and 17676 transitions. [2019-11-06 22:14:19,939 INFO L78 Accepts]: Start accepts. Automaton has 11695 states and 17676 transitions. Word has length 58 [2019-11-06 22:14:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:19,940 INFO L462 AbstractCegarLoop]: Abstraction has 11695 states and 17676 transitions. [2019-11-06 22:14:19,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 22:14:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11695 states and 17676 transitions. [2019-11-06 22:14:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 22:14:19,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:19,944 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:19,944 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1177047496, now seen corresponding path program 1 times [2019-11-06 22:14:19,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:19,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177988754] [2019-11-06 22:14:19,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:20,124 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-11-06 22:14:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:20,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177988754] [2019-11-06 22:14:20,145 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:20,145 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:20,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254749826] [2019-11-06 22:14:20,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:14:20,146 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:20,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:14:20,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:20,146 INFO L87 Difference]: Start difference. First operand 11695 states and 17676 transitions. Second operand 7 states. [2019-11-06 22:14:22,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:22,421 INFO L93 Difference]: Finished difference Result 26750 states and 40687 transitions. [2019-11-06 22:14:22,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:22,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-11-06 22:14:22,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:22,460 INFO L225 Difference]: With dead ends: 26750 [2019-11-06 22:14:22,460 INFO L226 Difference]: Without dead ends: 16014 [2019-11-06 22:14:22,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2019-11-06 22:14:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 9824. [2019-11-06 22:14:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9824 states. [2019-11-06 22:14:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9824 states to 9824 states and 14759 transitions. [2019-11-06 22:14:23,624 INFO L78 Accepts]: Start accepts. Automaton has 9824 states and 14759 transitions. Word has length 59 [2019-11-06 22:14:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:23,624 INFO L462 AbstractCegarLoop]: Abstraction has 9824 states and 14759 transitions. [2019-11-06 22:14:23,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:14:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 9824 states and 14759 transitions. [2019-11-06 22:14:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 22:14:23,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:23,628 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:23,628 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -90485979, now seen corresponding path program 1 times [2019-11-06 22:14:23,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:23,629 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732110246] [2019-11-06 22:14:23,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:23,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732110246] [2019-11-06 22:14:23,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:23,790 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:23,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39553229] [2019-11-06 22:14:23,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:14:23,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:14:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:14:23,791 INFO L87 Difference]: Start difference. First operand 9824 states and 14759 transitions. Second operand 7 states. [2019-11-06 22:14:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:25,720 INFO L93 Difference]: Finished difference Result 20559 states and 30871 transitions. [2019-11-06 22:14:25,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:25,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-11-06 22:14:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:25,738 INFO L225 Difference]: With dead ends: 20559 [2019-11-06 22:14:25,738 INFO L226 Difference]: Without dead ends: 11316 [2019-11-06 22:14:25,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11316 states. [2019-11-06 22:14:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11316 to 7633. [2019-11-06 22:14:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7633 states. [2019-11-06 22:14:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 11363 transitions. [2019-11-06 22:14:26,614 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 11363 transitions. Word has length 59 [2019-11-06 22:14:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:26,614 INFO L462 AbstractCegarLoop]: Abstraction has 7633 states and 11363 transitions. [2019-11-06 22:14:26,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:14:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 11363 transitions. [2019-11-06 22:14:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 22:14:26,616 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:26,617 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:26,617 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -226647092, now seen corresponding path program 1 times [2019-11-06 22:14:26,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:26,617 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436903171] [2019-11-06 22:14:26,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:26,854 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-11-06 22:14:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:26,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436903171] [2019-11-06 22:14:26,869 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:26,869 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:14:26,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785132767] [2019-11-06 22:14:26,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:26,870 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:26,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:26,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:26,870 INFO L87 Difference]: Start difference. First operand 7633 states and 11363 transitions. Second operand 6 states. [2019-11-06 22:14:27,047 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-11-06 22:14:29,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:29,094 INFO L93 Difference]: Finished difference Result 18447 states and 27375 transitions. [2019-11-06 22:14:29,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:29,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2019-11-06 22:14:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:29,110 INFO L225 Difference]: With dead ends: 18447 [2019-11-06 22:14:29,110 INFO L226 Difference]: Without dead ends: 10894 [2019-11-06 22:14:29,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:14:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2019-11-06 22:14:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 7633. [2019-11-06 22:14:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7633 states. [2019-11-06 22:14:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 11259 transitions. [2019-11-06 22:14:30,080 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 11259 transitions. Word has length 59 [2019-11-06 22:14:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:30,080 INFO L462 AbstractCegarLoop]: Abstraction has 7633 states and 11259 transitions. [2019-11-06 22:14:30,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:14:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 11259 transitions. [2019-11-06 22:14:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 22:14:30,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:30,083 INFO L410 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:14:30,083 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash 758768658, now seen corresponding path program 1 times [2019-11-06 22:14:30,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:30,083 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303384787] [2019-11-06 22:14:30,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:30,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303384787] [2019-11-06 22:14:30,259 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:30,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:14:30,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96487880] [2019-11-06 22:14:30,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:14:30,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:14:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:14:30,261 INFO L87 Difference]: Start difference. First operand 7633 states and 11259 transitions. Second operand 6 states. [2019-11-06 22:14:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:32,898 INFO L93 Difference]: Finished difference Result 20122 states and 29836 transitions. [2019-11-06 22:14:32,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:14:32,899 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2019-11-06 22:14:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:32,915 INFO L225 Difference]: With dead ends: 20122 [2019-11-06 22:14:32,915 INFO L226 Difference]: Without dead ends: 16178 [2019-11-06 22:14:32,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:14:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16178 states.