/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_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:15:17,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:15:17,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:15:17,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:15:17,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:15:17,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:15:17,671 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:15:17,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:15:17,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:15:17,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:15:17,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:15:17,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:15:17,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:15:17,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:15:17,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:15:17,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:15:17,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:15:17,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:15:17,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:15:17,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:15:17,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:15:17,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:15:17,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:15:17,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:15:17,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:15:17,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:15:17,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:15:17,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:15:17,700 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:15:17,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:15:17,701 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:15:17,702 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:15:17,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:15:17,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:15:17,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:15:17,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:15:17,705 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 22:15:17,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:15:17,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:15:17,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:15:17,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:15:17,726 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:15:17,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:15:17,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:15:17,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:15:17,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:15:17,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:15:17,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:15:17,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:15:17,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:15:17,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:15:17,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:15:17,730 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:15:17,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:15:17,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:15:17,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:15:17,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:15:17,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:15:17,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:15:17,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:15:17,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:15:17,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:15:17,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:15:17,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:15:17,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:15:17,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:15:18,036 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:15:18,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:15:18,057 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:15:18,058 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:15:18,058 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:15:18,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:15:18,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df6fa98/898d572d15904550a8d35302f36ba05a/FLAG2eab6d3e6 [2019-11-06 22:15:18,735 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:15:18,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:15:18,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df6fa98/898d572d15904550a8d35302f36ba05a/FLAG2eab6d3e6 [2019-11-06 22:15:18,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65df6fa98/898d572d15904550a8d35302f36ba05a [2019-11-06 22:15:18,934 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:15:18,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:15:18,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:15:18,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:15:18,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:15:18,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:18" (1/1) ... [2019-11-06 22:15:18,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36731635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:18, skipping insertion in model container [2019-11-06 22:15:18,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:15:18" (1/1) ... [2019-11-06 22:15:18,954 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:15:19,053 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:15:19,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:15:19,840 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:15:20,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:15:20,089 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:15:20,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20 WrapperNode [2019-11-06 22:15:20,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:15:20,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:15:20,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:15:20,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:15:20,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (1/1) ... [2019-11-06 22:15:20,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:15:20,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:15:20,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:15:20,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:15:20,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (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 22:15:20,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:15:20,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:15:20,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:15:20,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:15:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:15:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:15:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:15:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:15:20,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:15:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:15:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:15:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:15:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:15:20,328 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:15:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:15:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:15:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:15:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:15:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:15:22,185 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:15:22,185 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:15:22,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:22 BoogieIcfgContainer [2019-11-06 22:15:22,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:15:22,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:15:22,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:15:22,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:15:22,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:15:18" (1/3) ... [2019-11-06 22:15:22,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648ebc28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:22, skipping insertion in model container [2019-11-06 22:15:22,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:15:20" (2/3) ... [2019-11-06 22:15:22,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@648ebc28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:15:22, skipping insertion in model container [2019-11-06 22:15:22,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:15:22" (3/3) ... [2019-11-06 22:15:22,204 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:15:22,216 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:15:22,243 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-06 22:15:22,257 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-06 22:15:22,301 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:15:22,302 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:15:22,302 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:15:22,302 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:15:22,302 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:15:22,303 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:15:22,303 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:15:22,303 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:15:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states. [2019-11-06 22:15:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:15:22,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:22,372 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] [2019-11-06 22:15:22,374 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:22,381 INFO L82 PathProgramCache]: Analyzing trace with hash 257827157, now seen corresponding path program 1 times [2019-11-06 22:15:22,390 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:22,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175212042] [2019-11-06 22:15:22,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:23,364 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:23,430 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 22:15:23,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175212042] [2019-11-06 22:15:23,432 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:23,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:23,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312689470] [2019-11-06 22:15:23,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:23,442 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:23,459 INFO L87 Difference]: Start difference. First operand 416 states. Second operand 4 states. [2019-11-06 22:15:23,830 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-06 22:15:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:26,479 INFO L93 Difference]: Finished difference Result 759 states and 1331 transitions. [2019-11-06 22:15:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:26,481 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-11-06 22:15:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:26,501 INFO L225 Difference]: With dead ends: 759 [2019-11-06 22:15:26,501 INFO L226 Difference]: Without dead ends: 590 [2019-11-06 22:15:26,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2019-11-06 22:15:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 588. [2019-11-06 22:15:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 588 states. [2019-11-06 22:15:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 857 transitions. [2019-11-06 22:15:26,626 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 857 transitions. Word has length 151 [2019-11-06 22:15:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:26,628 INFO L462 AbstractCegarLoop]: Abstraction has 588 states and 857 transitions. [2019-11-06 22:15:26,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 857 transitions. [2019-11-06 22:15:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:15:26,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:26,631 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] [2019-11-06 22:15:26,631 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1201169525, now seen corresponding path program 1 times [2019-11-06 22:15:26,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:26,632 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574295848] [2019-11-06 22:15:26,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:27,121 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:27,195 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 22:15:27,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574295848] [2019-11-06 22:15:27,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:27,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:27,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664266671] [2019-11-06 22:15:27,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:27,199 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:27,200 INFO L87 Difference]: Start difference. First operand 588 states and 857 transitions. Second operand 4 states. [2019-11-06 22:15:27,473 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-11-06 22:15:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:29,694 INFO L93 Difference]: Finished difference Result 1187 states and 1790 transitions. [2019-11-06 22:15:29,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:29,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-11-06 22:15:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:29,708 INFO L225 Difference]: With dead ends: 1187 [2019-11-06 22:15:29,708 INFO L226 Difference]: Without dead ends: 964 [2019-11-06 22:15:29,714 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 22:15:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2019-11-06 22:15:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 962. [2019-11-06 22:15:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2019-11-06 22:15:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1427 transitions. [2019-11-06 22:15:29,767 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1427 transitions. Word has length 151 [2019-11-06 22:15:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:29,769 INFO L462 AbstractCegarLoop]: Abstraction has 962 states and 1427 transitions. [2019-11-06 22:15:29,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1427 transitions. [2019-11-06 22:15:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 22:15:29,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:29,777 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] [2019-11-06 22:15:29,777 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1200830901, now seen corresponding path program 1 times [2019-11-06 22:15:29,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:29,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415916426] [2019-11-06 22:15:29,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:30,467 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:30,512 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 22:15:30,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415916426] [2019-11-06 22:15:30,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:30,513 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:15:30,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260974983] [2019-11-06 22:15:30,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:15:30,514 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:15:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:30,515 INFO L87 Difference]: Start difference. First operand 962 states and 1427 transitions. Second operand 5 states. [2019-11-06 22:15:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:33,432 INFO L93 Difference]: Finished difference Result 2828 states and 4188 transitions. [2019-11-06 22:15:33,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:33,433 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2019-11-06 22:15:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:33,443 INFO L225 Difference]: With dead ends: 2828 [2019-11-06 22:15:33,444 INFO L226 Difference]: Without dead ends: 1879 [2019-11-06 22:15:33,446 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 22:15:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2019-11-06 22:15:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1837. [2019-11-06 22:15:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1837 states. [2019-11-06 22:15:33,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 2717 transitions. [2019-11-06 22:15:33,521 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 2717 transitions. Word has length 151 [2019-11-06 22:15:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:33,521 INFO L462 AbstractCegarLoop]: Abstraction has 1837 states and 2717 transitions. [2019-11-06 22:15:33,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:15:33,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 2717 transitions. [2019-11-06 22:15:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:15:33,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:33,525 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 22:15:33,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash -958267271, now seen corresponding path program 1 times [2019-11-06 22:15:33,526 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:33,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421476748] [2019-11-06 22:15:33,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:33,868 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:33,899 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 22:15:33,900 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421476748] [2019-11-06 22:15:33,900 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:33,900 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:33,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007365845] [2019-11-06 22:15:33,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:33,902 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:33,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:33,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:33,902 INFO L87 Difference]: Start difference. First operand 1837 states and 2717 transitions. Second operand 4 states. [2019-11-06 22:15:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:37,940 INFO L93 Difference]: Finished difference Result 5465 states and 8081 transitions. [2019-11-06 22:15:37,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:15:37,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-06 22:15:37,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:37,965 INFO L225 Difference]: With dead ends: 5465 [2019-11-06 22:15:37,966 INFO L226 Difference]: Without dead ends: 3660 [2019-11-06 22:15:37,972 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 22:15:37,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2019-11-06 22:15:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 1839. [2019-11-06 22:15:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1839 states. [2019-11-06 22:15:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2719 transitions. [2019-11-06 22:15:38,121 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2719 transitions. Word has length 152 [2019-11-06 22:15:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:38,121 INFO L462 AbstractCegarLoop]: Abstraction has 1839 states and 2719 transitions. [2019-11-06 22:15:38,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2719 transitions. [2019-11-06 22:15:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:15:38,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:38,128 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] [2019-11-06 22:15:38,129 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1744211523, now seen corresponding path program 1 times [2019-11-06 22:15:38,130 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:38,131 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226246911] [2019-11-06 22:15:38,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:38,734 WARN L191 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:38,819 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 22:15:38,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226246911] [2019-11-06 22:15:38,820 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:38,821 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:38,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538875831] [2019-11-06 22:15:38,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:38,823 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:38,824 INFO L87 Difference]: Start difference. First operand 1839 states and 2719 transitions. Second operand 4 states. [2019-11-06 22:15:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:42,332 INFO L93 Difference]: Finished difference Result 5196 states and 7684 transitions. [2019-11-06 22:15:42,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:15:42,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-11-06 22:15:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:42,348 INFO L225 Difference]: With dead ends: 5196 [2019-11-06 22:15:42,349 INFO L226 Difference]: Without dead ends: 3554 [2019-11-06 22:15:42,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2019-11-06 22:15:42,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 3512. [2019-11-06 22:15:42,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3512 states. [2019-11-06 22:15:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3512 states to 3512 states and 5152 transitions. [2019-11-06 22:15:42,492 INFO L78 Accepts]: Start accepts. Automaton has 3512 states and 5152 transitions. Word has length 153 [2019-11-06 22:15:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:42,493 INFO L462 AbstractCegarLoop]: Abstraction has 3512 states and 5152 transitions. [2019-11-06 22:15:42,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3512 states and 5152 transitions. [2019-11-06 22:15:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:15:42,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:42,502 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] [2019-11-06 22:15:42,502 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash 294713414, now seen corresponding path program 1 times [2019-11-06 22:15:42,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:42,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525961597] [2019-11-06 22:15:42,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:43,054 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:43,101 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 22:15:43,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525961597] [2019-11-06 22:15:43,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:43,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:15:43,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128033483] [2019-11-06 22:15:43,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:15:43,104 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:43,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:15:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:15:43,105 INFO L87 Difference]: Start difference. First operand 3512 states and 5152 transitions. Second operand 5 states. [2019-11-06 22:15:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:44,853 INFO L93 Difference]: Finished difference Result 6017 states and 8836 transitions. [2019-11-06 22:15:44,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:15:44,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-11-06 22:15:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:44,867 INFO L225 Difference]: With dead ends: 6017 [2019-11-06 22:15:44,867 INFO L226 Difference]: Without dead ends: 2690 [2019-11-06 22:15:44,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:15:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2019-11-06 22:15:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2690. [2019-11-06 22:15:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-11-06 22:15:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3933 transitions. [2019-11-06 22:15:44,982 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3933 transitions. Word has length 153 [2019-11-06 22:15:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:44,983 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 3933 transitions. [2019-11-06 22:15:44,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:15:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3933 transitions. [2019-11-06 22:15:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:15:44,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:44,987 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 22:15:44,988 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2083946363, now seen corresponding path program 1 times [2019-11-06 22:15:44,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:44,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958409498] [2019-11-06 22:15:44,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:45,308 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:45,339 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 22:15:45,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958409498] [2019-11-06 22:15:45,340 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:45,340 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:15:45,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703100253] [2019-11-06 22:15:45,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:15:45,342 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:45,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:15:45,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:15:45,342 INFO L87 Difference]: Start difference. First operand 2690 states and 3933 transitions. Second operand 4 states. [2019-11-06 22:15:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:15:47,289 INFO L93 Difference]: Finished difference Result 6148 states and 9216 transitions. [2019-11-06 22:15:47,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:15:47,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 154 [2019-11-06 22:15:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:15:47,307 INFO L225 Difference]: With dead ends: 6148 [2019-11-06 22:15:47,307 INFO L226 Difference]: Without dead ends: 3644 [2019-11-06 22:15:47,313 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 22:15:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2019-11-06 22:15:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 3558. [2019-11-06 22:15:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3558 states. [2019-11-06 22:15:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 5350 transitions. [2019-11-06 22:15:47,459 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 5350 transitions. Word has length 154 [2019-11-06 22:15:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:15:47,460 INFO L462 AbstractCegarLoop]: Abstraction has 3558 states and 5350 transitions. [2019-11-06 22:15:47,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:15:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 5350 transitions. [2019-11-06 22:15:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 22:15:47,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:15:47,469 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 22:15:47,469 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:15:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:15:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash -564593784, now seen corresponding path program 1 times [2019-11-06 22:15:47,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:15:47,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032495383] [2019-11-06 22:15:47,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:15:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:48,075 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2019-11-06 22:15:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:15:48,197 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 22:15:48,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032495383] [2019-11-06 22:15:48,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:15:48,198 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-11-06 22:15:48,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693832897] [2019-11-06 22:15:48,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 22:15:48,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:15:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 22:15:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:15:48,201 INFO L87 Difference]: Start difference. First operand 3558 states and 5350 transitions. Second operand 14 states. [2019-11-06 22:15:48,535 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 209