/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_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:13:17,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:13:17,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:13:17,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:13:17,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:13:17,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:13:18,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:13:18,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:13:18,014 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:13:18,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:13:18,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:13:18,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:13:18,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:13:18,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:13:18,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:13:18,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:13:18,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:13:18,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:13:18,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:13:18,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:13:18,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:13:18,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:13:18,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:13:18,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:13:18,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:13:18,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:13:18,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:13:18,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:13:18,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:13:18,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:13:18,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:13:18,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:13:18,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:13:18,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:13:18,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:13:18,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:13:18,043 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 22:13:18,056 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:13:18,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:13:18,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:13:18,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:13:18,058 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:13:18,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:13:18,058 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:13:18,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:13:18,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:13:18,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:13:18,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:13:18,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:13:18,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:13:18,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:13:18,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:13:18,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:13:18,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:13:18,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:13:18,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:13:18,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:13:18,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:13:18,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:18,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:13:18,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:13:18,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:13:18,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:13:18,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:13:18,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:13:18,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:13:18,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:13:18,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:13:18,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:13:18,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:13:18,348 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:13:18,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:18,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf63a1e75/b90b30cb81904985b11b5534f76b92d6/FLAGd85c6df1e [2019-11-06 22:13:18,963 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:13:18,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:18,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf63a1e75/b90b30cb81904985b11b5534f76b92d6/FLAGd85c6df1e [2019-11-06 22:13:19,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf63a1e75/b90b30cb81904985b11b5534f76b92d6 [2019-11-06 22:13:19,214 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:13:19,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:13:19,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:19,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:13:19,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:13:19,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:19" (1/1) ... [2019-11-06 22:13:19,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e06f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:19, skipping insertion in model container [2019-11-06 22:13:19,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:19" (1/1) ... [2019-11-06 22:13:19,232 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:13:19,302 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:13:19,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:19,859 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:13:20,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:20,038 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:13:20,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20 WrapperNode [2019-11-06 22:13:20,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:20,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:13:20,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:13:20,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:13:20,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (1/1) ... [2019-11-06 22:13:20,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:13:20,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:13:20,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:13:20,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:13:20,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (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 22:13:20,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:13:20,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:13:20,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:13:20,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:13:20,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:13:20,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:13:20,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:13:20,232 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:13:20,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:13:20,232 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:13:20,233 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:13:20,233 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:13:20,233 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:13:20,234 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:13:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:13:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:13:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:13:20,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:13:20,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:13:21,763 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:13:21,763 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:13:21,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:21 BoogieIcfgContainer [2019-11-06 22:13:21,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:13:21,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:13:21,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:13:21,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:13:21,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:19" (1/3) ... [2019-11-06 22:13:21,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a2aa8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:21, skipping insertion in model container [2019-11-06 22:13:21,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:20" (2/3) ... [2019-11-06 22:13:21,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a2aa8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:21, skipping insertion in model container [2019-11-06 22:13:21,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:21" (3/3) ... [2019-11-06 22:13:21,780 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-11-06 22:13:21,791 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:13:21,813 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:13:21,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:13:21,875 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:13:21,875 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:13:21,875 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:13:21,875 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:13:21,876 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:13:21,876 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:13:21,876 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:13:21,876 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:13:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states. [2019-11-06 22:13:21,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:13:21,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:21,931 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:21,932 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1464169863, now seen corresponding path program 1 times [2019-11-06 22:13:21,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:21,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670527072] [2019-11-06 22:13:21,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:22,839 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:22,908 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 22:13:22,908 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670527072] [2019-11-06 22:13:22,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:22,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:22,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371769082] [2019-11-06 22:13:22,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:22,920 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:22,938 INFO L87 Difference]: Start difference. First operand 306 states. Second operand 4 states. [2019-11-06 22:13:23,241 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:13:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:24,898 INFO L93 Difference]: Finished difference Result 619 states and 1086 transitions. [2019-11-06 22:13:24,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:24,901 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-11-06 22:13:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:24,921 INFO L225 Difference]: With dead ends: 619 [2019-11-06 22:13:24,921 INFO L226 Difference]: Without dead ends: 492 [2019-11-06 22:13:24,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2019-11-06 22:13:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2019-11-06 22:13:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2019-11-06 22:13:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 727 transitions. [2019-11-06 22:13:25,049 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 727 transitions. Word has length 147 [2019-11-06 22:13:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:25,051 INFO L462 AbstractCegarLoop]: Abstraction has 490 states and 727 transitions. [2019-11-06 22:13:25,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 727 transitions. [2019-11-06 22:13:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:13:25,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:25,056 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:25,056 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash 558735771, now seen corresponding path program 1 times [2019-11-06 22:13:25,057 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:25,057 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307232358] [2019-11-06 22:13:25,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:25,458 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:25,505 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 22:13:25,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307232358] [2019-11-06 22:13:25,506 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:25,507 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:25,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950797728] [2019-11-06 22:13:25,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:25,509 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:25,510 INFO L87 Difference]: Start difference. First operand 490 states and 727 transitions. Second operand 4 states. [2019-11-06 22:13:25,768 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-11-06 22:13:26,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:26,944 INFO L93 Difference]: Finished difference Result 1032 states and 1578 transitions. [2019-11-06 22:13:26,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:26,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2019-11-06 22:13:26,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:26,952 INFO L225 Difference]: With dead ends: 1032 [2019-11-06 22:13:26,952 INFO L226 Difference]: Without dead ends: 840 [2019-11-06 22:13:26,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2019-11-06 22:13:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 838. [2019-11-06 22:13:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2019-11-06 22:13:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1255 transitions. [2019-11-06 22:13:26,997 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1255 transitions. Word has length 147 [2019-11-06 22:13:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:26,998 INFO L462 AbstractCegarLoop]: Abstraction has 838 states and 1255 transitions. [2019-11-06 22:13:26,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1255 transitions. [2019-11-06 22:13:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:13:27,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:27,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:27,003 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:27,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1754446721, now seen corresponding path program 1 times [2019-11-06 22:13:27,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:27,004 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766465389] [2019-11-06 22:13:27,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:27,476 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:27,515 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 22:13:27,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766465389] [2019-11-06 22:13:27,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:27,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:27,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856233373] [2019-11-06 22:13:27,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:27,522 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:27,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:27,531 INFO L87 Difference]: Start difference. First operand 838 states and 1255 transitions. Second operand 5 states. [2019-11-06 22:13:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:29,851 INFO L93 Difference]: Finished difference Result 2461 states and 3682 transitions. [2019-11-06 22:13:29,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:29,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-06 22:13:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:29,863 INFO L225 Difference]: With dead ends: 2461 [2019-11-06 22:13:29,864 INFO L226 Difference]: Without dead ends: 1636 [2019-11-06 22:13:29,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2019-11-06 22:13:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1634. [2019-11-06 22:13:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2019-11-06 22:13:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2428 transitions. [2019-11-06 22:13:29,978 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2428 transitions. Word has length 147 [2019-11-06 22:13:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:29,978 INFO L462 AbstractCegarLoop]: Abstraction has 1634 states and 2428 transitions. [2019-11-06 22:13:29,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:29,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2428 transitions. [2019-11-06 22:13:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 22:13:29,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:29,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:29,985 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash 818598479, now seen corresponding path program 1 times [2019-11-06 22:13:29,986 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:29,986 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201678329] [2019-11-06 22:13:29,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:30,339 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:30,375 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 22:13:30,376 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201678329] [2019-11-06 22:13:30,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:30,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:30,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376655630] [2019-11-06 22:13:30,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:30,378 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:30,379 INFO L87 Difference]: Start difference. First operand 1634 states and 2428 transitions. Second operand 4 states. [2019-11-06 22:13:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:32,279 INFO L93 Difference]: Finished difference Result 4856 states and 7214 transitions. [2019-11-06 22:13:32,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:32,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2019-11-06 22:13:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:32,298 INFO L225 Difference]: With dead ends: 4856 [2019-11-06 22:13:32,299 INFO L226 Difference]: Without dead ends: 3254 [2019-11-06 22:13:32,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2019-11-06 22:13:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 1636. [2019-11-06 22:13:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2019-11-06 22:13:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2430 transitions. [2019-11-06 22:13:32,418 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2430 transitions. Word has length 148 [2019-11-06 22:13:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:32,418 INFO L462 AbstractCegarLoop]: Abstraction has 1636 states and 2430 transitions. [2019-11-06 22:13:32,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2430 transitions. [2019-11-06 22:13:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:13:32,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:32,422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:32,422 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -77658400, now seen corresponding path program 1 times [2019-11-06 22:13:32,423 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:32,423 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752548161] [2019-11-06 22:13:32,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:32,787 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:32,825 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 22:13:32,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752548161] [2019-11-06 22:13:32,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:32,826 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:32,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919294505] [2019-11-06 22:13:32,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:32,827 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:32,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:32,828 INFO L87 Difference]: Start difference. First operand 1636 states and 2430 transitions. Second operand 5 states. [2019-11-06 22:13:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:34,184 INFO L93 Difference]: Finished difference Result 3258 states and 4842 transitions. [2019-11-06 22:13:34,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:34,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-11-06 22:13:34,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:34,193 INFO L225 Difference]: With dead ends: 3258 [2019-11-06 22:13:34,194 INFO L226 Difference]: Without dead ends: 1634 [2019-11-06 22:13:34,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2019-11-06 22:13:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1634. [2019-11-06 22:13:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1634 states. [2019-11-06 22:13:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 2426 transitions. [2019-11-06 22:13:34,326 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 2426 transitions. Word has length 149 [2019-11-06 22:13:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:34,327 INFO L462 AbstractCegarLoop]: Abstraction has 1634 states and 2426 transitions. [2019-11-06 22:13:34,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 2426 transitions. [2019-11-06 22:13:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:13:34,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:34,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:34,334 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:34,334 INFO L82 PathProgramCache]: Analyzing trace with hash -381277494, now seen corresponding path program 1 times [2019-11-06 22:13:34,334 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:34,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663308220] [2019-11-06 22:13:34,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:34,647 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:34,685 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 22:13:34,685 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663308220] [2019-11-06 22:13:34,686 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:34,687 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:34,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627034314] [2019-11-06 22:13:34,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:34,688 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:34,688 INFO L87 Difference]: Start difference. First operand 1634 states and 2426 transitions. Second operand 4 states. [2019-11-06 22:13:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:36,708 INFO L93 Difference]: Finished difference Result 3870 states and 5761 transitions. [2019-11-06 22:13:36,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:36,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-06 22:13:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:36,725 INFO L225 Difference]: With dead ends: 3870 [2019-11-06 22:13:36,725 INFO L226 Difference]: Without dead ends: 2414 [2019-11-06 22:13:36,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2019-11-06 22:13:36,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2019-11-06 22:13:36,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2019-11-06 22:13:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3535 transitions. [2019-11-06 22:13:36,843 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3535 transitions. Word has length 149 [2019-11-06 22:13:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:36,843 INFO L462 AbstractCegarLoop]: Abstraction has 2412 states and 3535 transitions. [2019-11-06 22:13:36,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3535 transitions. [2019-11-06 22:13:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:13:36,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:36,848 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:36,848 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:36,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1397721559, now seen corresponding path program 1 times [2019-11-06 22:13:36,849 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:36,849 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819979495] [2019-11-06 22:13:36,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:37,225 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:37,291 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 22:13:37,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819979495] [2019-11-06 22:13:37,292 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:37,292 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:37,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041339198] [2019-11-06 22:13:37,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:13:37,295 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:37,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:13:37,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:37,296 INFO L87 Difference]: Start difference. First operand 2412 states and 3535 transitions. Second operand 6 states. [2019-11-06 22:13:37,688 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2019-11-06 22:13:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:39,040 INFO L93 Difference]: Finished difference Result 4658 states and 6855 transitions. [2019-11-06 22:13:39,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:13:39,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-11-06 22:13:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:39,058 INFO L225 Difference]: With dead ends: 4658 [2019-11-06 22:13:39,059 INFO L226 Difference]: Without dead ends: 2414 [2019-11-06 22:13:39,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:13:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2019-11-06 22:13:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 2412. [2019-11-06 22:13:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2412 states. [2019-11-06 22:13:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3520 transitions. [2019-11-06 22:13:39,163 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3520 transitions. Word has length 152 [2019-11-06 22:13:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:39,163 INFO L462 AbstractCegarLoop]: Abstraction has 2412 states and 3520 transitions. [2019-11-06 22:13:39,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:13:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3520 transitions. [2019-11-06 22:13:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:13:39,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:39,168 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:39,168 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1633318332, now seen corresponding path program 1 times [2019-11-06 22:13:39,169 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:39,169 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138475011] [2019-11-06 22:13:39,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:39,577 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:39,630 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 22:13:39,631 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138475011] [2019-11-06 22:13:39,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:39,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:39,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215675665] [2019-11-06 22:13:39,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:39,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:39,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:39,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:39,634 INFO L87 Difference]: Start difference. First operand 2412 states and 3520 transitions. Second operand 5 states. [2019-11-06 22:13:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:41,702 INFO L93 Difference]: Finished difference Result 6242 states and 9103 transitions. [2019-11-06 22:13:41,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:41,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2019-11-06 22:13:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:41,720 INFO L225 Difference]: With dead ends: 6242 [2019-11-06 22:13:41,721 INFO L226 Difference]: Without dead ends: 3853 [2019-11-06 22:13:41,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2019-11-06 22:13:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3851. [2019-11-06 22:13:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3851 states. [2019-11-06 22:13:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5567 transitions. [2019-11-06 22:13:41,908 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5567 transitions. Word has length 152 [2019-11-06 22:13:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:41,908 INFO L462 AbstractCegarLoop]: Abstraction has 3851 states and 5567 transitions. [2019-11-06 22:13:41,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5567 transitions. [2019-11-06 22:13:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:13:41,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:41,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:41,920 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash -83620211, now seen corresponding path program 1 times [2019-11-06 22:13:41,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:41,921 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983823991] [2019-11-06 22:13:41,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:42,206 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:42,245 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 22:13:42,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983823991] [2019-11-06 22:13:42,246 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:42,246 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:42,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140669518] [2019-11-06 22:13:42,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:42,247 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:42,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:42,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:42,248 INFO L87 Difference]: Start difference. First operand 3851 states and 5567 transitions. Second operand 4 states. [2019-11-06 22:13:44,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:44,421 INFO L93 Difference]: Finished difference Result 10239 states and 14831 transitions. [2019-11-06 22:13:44,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:44,422 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-06 22:13:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:44,447 INFO L225 Difference]: With dead ends: 10239 [2019-11-06 22:13:44,448 INFO L226 Difference]: Without dead ends: 6731 [2019-11-06 22:13:44,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6731 states. [2019-11-06 22:13:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6731 to 6729. [2019-11-06 22:13:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6729 states. [2019-11-06 22:13:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 9603 transitions. [2019-11-06 22:13:44,806 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 9603 transitions. Word has length 154 [2019-11-06 22:13:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:44,807 INFO L462 AbstractCegarLoop]: Abstraction has 6729 states and 9603 transitions. [2019-11-06 22:13:44,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:13:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 9603 transitions. [2019-11-06 22:13:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:13:44,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:44,818 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:44,818 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 423811114, now seen corresponding path program 1 times [2019-11-06 22:13:44,819 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:44,819 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128036152] [2019-11-06 22:13:44,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:45,121 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:45,154 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 22:13:45,154 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128036152] [2019-11-06 22:13:45,154 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:45,154 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:45,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642832192] [2019-11-06 22:13:45,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:45,155 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:45,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:45,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:45,156 INFO L87 Difference]: Start difference. First operand 6729 states and 9603 transitions. Second operand 5 states. [2019-11-06 22:13:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:46,398 INFO L93 Difference]: Finished difference Result 11002 states and 15732 transitions. [2019-11-06 22:13:46,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:46,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-11-06 22:13:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:46,420 INFO L225 Difference]: With dead ends: 11002 [2019-11-06 22:13:46,420 INFO L226 Difference]: Without dead ends: 5964 [2019-11-06 22:13:46,429 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2019-11-06 22:13:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5964. [2019-11-06 22:13:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5964 states. [2019-11-06 22:13:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 8508 transitions. [2019-11-06 22:13:46,652 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 8508 transitions. Word has length 154 [2019-11-06 22:13:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:46,652 INFO L462 AbstractCegarLoop]: Abstraction has 5964 states and 8508 transitions. [2019-11-06 22:13:46,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 8508 transitions. [2019-11-06 22:13:46,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:13:46,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:46,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:46,661 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 923876710, now seen corresponding path program 1 times [2019-11-06 22:13:46,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:46,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228531261] [2019-11-06 22:13:46,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:46,979 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:47,019 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 22:13:47,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228531261] [2019-11-06 22:13:47,020 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:47,020 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:13:47,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86584564] [2019-11-06 22:13:47,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:13:47,021 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:47,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:13:47,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:13:47,022 INFO L87 Difference]: Start difference. First operand 5964 states and 8508 transitions. Second operand 5 states. [2019-11-06 22:13:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:49,126 INFO L93 Difference]: Finished difference Result 17410 states and 24777 transitions. [2019-11-06 22:13:49,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:13:49,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-06 22:13:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:49,148 INFO L225 Difference]: With dead ends: 17410 [2019-11-06 22:13:49,148 INFO L226 Difference]: Without dead ends: 11489 [2019-11-06 22:13:49,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:13:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11489 states. [2019-11-06 22:13:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11489 to 11487. [2019-11-06 22:13:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11487 states. [2019-11-06 22:13:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11487 states to 11487 states and 16184 transitions. [2019-11-06 22:13:49,681 INFO L78 Accepts]: Start accepts. Automaton has 11487 states and 16184 transitions. Word has length 157 [2019-11-06 22:13:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:13:49,682 INFO L462 AbstractCegarLoop]: Abstraction has 11487 states and 16184 transitions. [2019-11-06 22:13:49,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:13:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11487 states and 16184 transitions. [2019-11-06 22:13:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 22:13:49,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:49,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:13:49,693 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:49,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2109819854, now seen corresponding path program 1 times [2019-11-06 22:13:49,694 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:49,694 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041506373] [2019-11-06 22:13:49,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:49,912 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-11-06 22:13:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:49,938 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 22:13:49,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041506373] [2019-11-06 22:13:49,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:49,939 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:49,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669223872] [2019-11-06 22:13:49,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:49,940 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:49,940 INFO L87 Difference]: Start difference. First operand 11487 states and 16184 transitions. Second operand 4 states. [2019-11-06 22:13:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:13:52,594 INFO L93 Difference]: Finished difference Result 34269 states and 48305 transitions. [2019-11-06 22:13:52,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:13:52,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-11-06 22:13:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:13:52,636 INFO L225 Difference]: With dead ends: 34269 [2019-11-06 22:13:52,636 INFO L226 Difference]: Without dead ends: 22887 [2019-11-06 22:13:52,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22887 states.