java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:45:40,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:45:40,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:45:40,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:45:40,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:45:40,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:45:40,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:45:40,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:45:40,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:45:40,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:45:40,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:45:40,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:45:40,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:45:40,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:45:40,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:45:40,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:45:40,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:45:40,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:45:40,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:45:40,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:45:40,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:45:40,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:45:40,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:45:40,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:45:40,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:45:40,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:45:40,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:45:40,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:45:40,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:45:40,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:45:40,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:45:40,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:45:40,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:45:40,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:45:40,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:45:40,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:45:40,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:45:40,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:45:40,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:45:40,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:45:40,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:45:40,789 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 [2019-10-13 19:45:40,803 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:45:40,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:45:40,804 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:45:40,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:45:40,805 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:45:40,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:45:40,805 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:45:40,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:45:40,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:45:40,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:45:40,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:45:40,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:45:40,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:45:40,807 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:45:40,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:45:40,807 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:45:40,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:45:40,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:45:40,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:45:40,808 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:45:40,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:45:40,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:45:40,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:45:40,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:45:40,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:45:40,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:45:40,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:45:40,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:45:40,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:45:41,141 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:45:41,163 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:45:41,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:45:41,168 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:45:41,169 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:45:41,169 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-10-13 19:45:41,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7479159/71e9b56a5d7e467b8088bf13c8fbbafe/FLAGcb1412897 [2019-10-13 19:45:41,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:45:41,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-10-13 19:45:41,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7479159/71e9b56a5d7e467b8088bf13c8fbbafe/FLAGcb1412897 [2019-10-13 19:45:42,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a7479159/71e9b56a5d7e467b8088bf13c8fbbafe [2019-10-13 19:45:42,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:45:42,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:45:42,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:42,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:45:42,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:45:42,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e9fe8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42, skipping insertion in model container [2019-10-13 19:45:42,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,094 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:45:42,155 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:45:42,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:42,669 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:45:42,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:45:42,780 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:45:42,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42 WrapperNode [2019-10-13 19:45:42,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:45:42,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:45:42,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:45:42,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:45:42,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (1/1) ... [2019-10-13 19:45:42,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:45:42,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:45:42,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:45:42,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:45:42,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (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 [2019-10-13 19:45:42,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:45:42,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:45:42,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:45:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:45:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-13 19:45:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-13 19:45:42,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-13 19:45:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-13 19:45:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:45:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-13 19:45:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-13 19:45:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-13 19:45:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-13 19:45:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-13 19:45:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-13 19:45:42,905 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-13 19:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:45:42,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:45:43,720 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:45:43,721 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:45:43,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:43 BoogieIcfgContainer [2019-10-13 19:45:43,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:45:43,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:45:43,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:45:43,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:45:43,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:45:42" (1/3) ... [2019-10-13 19:45:43,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510029bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:43, skipping insertion in model container [2019-10-13 19:45:43,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:45:42" (2/3) ... [2019-10-13 19:45:43,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510029bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:45:43, skipping insertion in model container [2019-10-13 19:45:43,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:45:43" (3/3) ... [2019-10-13 19:45:43,738 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2019-10-13 19:45:43,747 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:45:43,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:45:43,763 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:45:43,786 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:45:43,786 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:45:43,786 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:45:43,786 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:45:43,787 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:45:43,787 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:45:43,787 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:45:43,787 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:45:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2019-10-13 19:45:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 19:45:43,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:43,814 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:43,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash -276696918, now seen corresponding path program 1 times [2019-10-13 19:45:43,827 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:43,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-13 19:45:43,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:43,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:43,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:44,403 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:45:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:44,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851114899] [2019-10-13 19:45:44,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:44,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:45:44,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739006210] [2019-10-13 19:45:44,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:45:44,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:45:44,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:45:44,465 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 7 states. [2019-10-13 19:45:44,646 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-13 19:45:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:45,701 INFO L93 Difference]: Finished difference Result 721 states and 1142 transitions. [2019-10-13 19:45:45,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:45:45,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2019-10-13 19:45:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:45,729 INFO L225 Difference]: With dead ends: 721 [2019-10-13 19:45:45,729 INFO L226 Difference]: Without dead ends: 630 [2019-10-13 19:45:45,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:45:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2019-10-13 19:45:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 423. [2019-10-13 19:45:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2019-10-13 19:45:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 647 transitions. [2019-10-13 19:45:45,857 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 647 transitions. Word has length 52 [2019-10-13 19:45:45,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:45,857 INFO L462 AbstractCegarLoop]: Abstraction has 423 states and 647 transitions. [2019-10-13 19:45:45,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:45:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 647 transitions. [2019-10-13 19:45:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:45:45,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:45,860 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:45,860 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1087729035, now seen corresponding path program 1 times [2019-10-13 19:45:45,861 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:45,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67971937] [2019-10-13 19:45:45,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:45,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:45,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:46,137 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:45:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:46,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67971937] [2019-10-13 19:45:46,156 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:46,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:46,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520972214] [2019-10-13 19:45:46,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:46,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:46,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:46,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:46,160 INFO L87 Difference]: Start difference. First operand 423 states and 647 transitions. Second operand 4 states. [2019-10-13 19:45:46,317 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2019-10-13 19:45:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:46,940 INFO L93 Difference]: Finished difference Result 1104 states and 1713 transitions. [2019-10-13 19:45:46,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:46,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-13 19:45:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:46,945 INFO L225 Difference]: With dead ends: 1104 [2019-10-13 19:45:46,946 INFO L226 Difference]: Without dead ends: 748 [2019-10-13 19:45:46,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:46,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2019-10-13 19:45:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 746. [2019-10-13 19:45:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2019-10-13 19:45:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1138 transitions. [2019-10-13 19:45:47,003 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1138 transitions. Word has length 55 [2019-10-13 19:45:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:47,003 INFO L462 AbstractCegarLoop]: Abstraction has 746 states and 1138 transitions. [2019-10-13 19:45:47,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1138 transitions. [2019-10-13 19:45:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-13 19:45:47,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:47,007 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:47,007 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:47,007 INFO L82 PathProgramCache]: Analyzing trace with hash 917757431, now seen corresponding path program 1 times [2019-10-13 19:45:47,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:47,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726276105] [2019-10-13 19:45:47,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:47,199 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:45:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:47,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726276105] [2019-10-13 19:45:47,217 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:47,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:45:47,218 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824601037] [2019-10-13 19:45:47,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:45:47,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:45:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:45:47,219 INFO L87 Difference]: Start difference. First operand 746 states and 1138 transitions. Second operand 4 states. [2019-10-13 19:45:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:47,868 INFO L93 Difference]: Finished difference Result 2006 states and 3079 transitions. [2019-10-13 19:45:47,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:45:47,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-13 19:45:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:47,876 INFO L225 Difference]: With dead ends: 2006 [2019-10-13 19:45:47,877 INFO L226 Difference]: Without dead ends: 1335 [2019-10-13 19:45:47,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:45:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2019-10-13 19:45:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1333. [2019-10-13 19:45:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2019-10-13 19:45:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2001 transitions. [2019-10-13 19:45:47,948 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2001 transitions. Word has length 55 [2019-10-13 19:45:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:47,949 INFO L462 AbstractCegarLoop]: Abstraction has 1333 states and 2001 transitions. [2019-10-13 19:45:47,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:45:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2001 transitions. [2019-10-13 19:45:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 19:45:47,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:47,952 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:47,952 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash -41555275, now seen corresponding path program 1 times [2019-10-13 19:45:47,953 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:47,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413907428] [2019-10-13 19:45:47,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,954 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:47,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:48,243 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:45:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:48,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413907428] [2019-10-13 19:45:48,280 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:48,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-13 19:45:48,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562202754] [2019-10-13 19:45:48,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:45:48,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:48,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:45:48,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:45:48,282 INFO L87 Difference]: Start difference. First operand 1333 states and 2001 transitions. Second operand 11 states. [2019-10-13 19:45:48,462 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2019-10-13 19:45:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:51,281 INFO L93 Difference]: Finished difference Result 7842 states and 11792 transitions. [2019-10-13 19:45:51,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:45:51,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2019-10-13 19:45:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:51,319 INFO L225 Difference]: With dead ends: 7842 [2019-10-13 19:45:51,319 INFO L226 Difference]: Without dead ends: 7341 [2019-10-13 19:45:51,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:45:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2019-10-13 19:45:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 1358. [2019-10-13 19:45:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1358 states. [2019-10-13 19:45:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2033 transitions. [2019-10-13 19:45:51,510 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2033 transitions. Word has length 56 [2019-10-13 19:45:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:51,511 INFO L462 AbstractCegarLoop]: Abstraction has 1358 states and 2033 transitions. [2019-10-13 19:45:51,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:45:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2033 transitions. [2019-10-13 19:45:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:45:51,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:51,514 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:51,514 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:51,515 INFO L82 PathProgramCache]: Analyzing trace with hash -742667424, now seen corresponding path program 1 times [2019-10-13 19:45:51,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:51,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798817169] [2019-10-13 19:45:51,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:51,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:51,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:51,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798817169] [2019-10-13 19:45:51,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:51,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:45:51,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936959409] [2019-10-13 19:45:51,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:45:51,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:51,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:45:51,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:45:51,781 INFO L87 Difference]: Start difference. First operand 1358 states and 2033 transitions. Second operand 8 states. [2019-10-13 19:45:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:53,066 INFO L93 Difference]: Finished difference Result 5747 states and 8758 transitions. [2019-10-13 19:45:53,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:45:53,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2019-10-13 19:45:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:53,090 INFO L225 Difference]: With dead ends: 5747 [2019-10-13 19:45:53,091 INFO L226 Difference]: Without dead ends: 5246 [2019-10-13 19:45:53,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:45:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5246 states. [2019-10-13 19:45:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5246 to 1339. [2019-10-13 19:45:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-10-13 19:45:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 2009 transitions. [2019-10-13 19:45:53,260 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 2009 transitions. Word has length 57 [2019-10-13 19:45:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:53,262 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 2009 transitions. [2019-10-13 19:45:53,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:45:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 2009 transitions. [2019-10-13 19:45:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 19:45:53,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:53,264 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:53,264 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:53,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:53,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1896016447, now seen corresponding path program 1 times [2019-10-13 19:45:53,265 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:53,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139311521] [2019-10-13 19:45:53,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:53,265 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:53,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:53,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139311521] [2019-10-13 19:45:53,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:53,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 19:45:53,538 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650495132] [2019-10-13 19:45:53,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:45:53,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:45:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:45:53,539 INFO L87 Difference]: Start difference. First operand 1339 states and 2009 transitions. Second operand 10 states. [2019-10-13 19:45:53,697 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2019-10-13 19:45:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:56,550 INFO L93 Difference]: Finished difference Result 8481 states and 12775 transitions. [2019-10-13 19:45:56,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:45:56,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2019-10-13 19:45:56,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:56,584 INFO L225 Difference]: With dead ends: 8481 [2019-10-13 19:45:56,584 INFO L226 Difference]: Without dead ends: 7351 [2019-10-13 19:45:56,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:45:56,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2019-10-13 19:45:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 1378. [2019-10-13 19:45:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1378 states. [2019-10-13 19:45:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2060 transitions. [2019-10-13 19:45:56,866 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2060 transitions. Word has length 57 [2019-10-13 19:45:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:56,867 INFO L462 AbstractCegarLoop]: Abstraction has 1378 states and 2060 transitions. [2019-10-13 19:45:56,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:45:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2060 transitions. [2019-10-13 19:45:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:45:56,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:56,869 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:56,870 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1439125625, now seen corresponding path program 1 times [2019-10-13 19:45:56,870 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:56,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996301266] [2019-10-13 19:45:56,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:56,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:56,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:57,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996301266] [2019-10-13 19:45:57,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:57,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 19:45:57,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417079647] [2019-10-13 19:45:57,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:45:57,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:45:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:45:57,105 INFO L87 Difference]: Start difference. First operand 1378 states and 2060 transitions. Second operand 8 states. [2019-10-13 19:45:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:45:58,477 INFO L93 Difference]: Finished difference Result 5650 states and 8490 transitions. [2019-10-13 19:45:58,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:45:58,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2019-10-13 19:45:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:45:58,496 INFO L225 Difference]: With dead ends: 5650 [2019-10-13 19:45:58,496 INFO L226 Difference]: Without dead ends: 4520 [2019-10-13 19:45:58,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:45:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2019-10-13 19:45:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 1359. [2019-10-13 19:45:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1359 states. [2019-10-13 19:45:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2033 transitions. [2019-10-13 19:45:58,681 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2033 transitions. Word has length 58 [2019-10-13 19:45:58,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:45:58,682 INFO L462 AbstractCegarLoop]: Abstraction has 1359 states and 2033 transitions. [2019-10-13 19:45:58,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:45:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2033 transitions. [2019-10-13 19:45:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:45:58,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:45:58,684 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:45:58,685 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:45:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:45:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1839206206, now seen corresponding path program 1 times [2019-10-13 19:45:58,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:45:58,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345583769] [2019-10-13 19:45:58,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:58,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:45:58,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:45:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:45:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:45:58,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345583769] [2019-10-13 19:45:58,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:45:58,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 19:45:58,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815674138] [2019-10-13 19:45:58,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:45:58,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:45:58,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:45:58,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:45:58,916 INFO L87 Difference]: Start difference. First operand 1359 states and 2033 transitions. Second operand 10 states. [2019-10-13 19:46:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:00,955 INFO L93 Difference]: Finished difference Result 7327 states and 11032 transitions. [2019-10-13 19:46:00,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:46:00,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2019-10-13 19:46:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:00,968 INFO L225 Difference]: With dead ends: 7327 [2019-10-13 19:46:00,969 INFO L226 Difference]: Without dead ends: 6095 [2019-10-13 19:46:00,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:46:00,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2019-10-13 19:46:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 3782. [2019-10-13 19:46:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3782 states. [2019-10-13 19:46:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 5672 transitions. [2019-10-13 19:46:01,389 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 5672 transitions. Word has length 58 [2019-10-13 19:46:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:01,389 INFO L462 AbstractCegarLoop]: Abstraction has 3782 states and 5672 transitions. [2019-10-13 19:46:01,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:46:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 5672 transitions. [2019-10-13 19:46:01,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 19:46:01,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:01,392 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:01,392 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1369199573, now seen corresponding path program 1 times [2019-10-13 19:46:01,393 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:01,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256423235] [2019-10-13 19:46:01,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:01,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:01,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:01,650 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:46:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:01,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256423235] [2019-10-13 19:46:01,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:01,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-13 19:46:01,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317601413] [2019-10-13 19:46:01,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:46:01,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:01,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:46:01,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:46:01,682 INFO L87 Difference]: Start difference. First operand 3782 states and 5672 transitions. Second operand 10 states. [2019-10-13 19:46:01,824 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-13 19:46:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:04,721 INFO L93 Difference]: Finished difference Result 19307 states and 28995 transitions. [2019-10-13 19:46:04,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:46:04,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2019-10-13 19:46:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:04,754 INFO L225 Difference]: With dead ends: 19307 [2019-10-13 19:46:04,755 INFO L226 Difference]: Without dead ends: 15977 [2019-10-13 19:46:04,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:46:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15977 states. [2019-10-13 19:46:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15977 to 11695. [2019-10-13 19:46:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11695 states. [2019-10-13 19:46:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11695 states to 11695 states and 17676 transitions. [2019-10-13 19:46:05,971 INFO L78 Accepts]: Start accepts. Automaton has 11695 states and 17676 transitions. Word has length 58 [2019-10-13 19:46:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:05,972 INFO L462 AbstractCegarLoop]: Abstraction has 11695 states and 17676 transitions. [2019-10-13 19:46:05,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:46:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11695 states and 17676 transitions. [2019-10-13 19:46:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 19:46:05,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:05,976 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:05,977 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:05,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1177047496, now seen corresponding path program 1 times [2019-10-13 19:46:05,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:05,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592906379] [2019-10-13 19:46:05,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:05,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:05,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:06,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592906379] [2019-10-13 19:46:06,160 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:06,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:06,160 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275901204] [2019-10-13 19:46:06,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:46:06,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:06,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:46:06,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:06,163 INFO L87 Difference]: Start difference. First operand 11695 states and 17676 transitions. Second operand 7 states. [2019-10-13 19:46:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:08,370 INFO L93 Difference]: Finished difference Result 26750 states and 40687 transitions. [2019-10-13 19:46:08,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:08,370 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-10-13 19:46:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:08,403 INFO L225 Difference]: With dead ends: 26750 [2019-10-13 19:46:08,404 INFO L226 Difference]: Without dead ends: 16014 [2019-10-13 19:46:08,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:46:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2019-10-13 19:46:09,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 9824. [2019-10-13 19:46:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9824 states. [2019-10-13 19:46:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9824 states to 9824 states and 14759 transitions. [2019-10-13 19:46:09,594 INFO L78 Accepts]: Start accepts. Automaton has 9824 states and 14759 transitions. Word has length 59 [2019-10-13 19:46:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:09,594 INFO L462 AbstractCegarLoop]: Abstraction has 9824 states and 14759 transitions. [2019-10-13 19:46:09,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:46:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9824 states and 14759 transitions. [2019-10-13 19:46:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 19:46:09,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:09,597 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:09,598 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -90485979, now seen corresponding path program 1 times [2019-10-13 19:46:09,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:09,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920388663] [2019-10-13 19:46:09,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:09,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:09,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:09,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920388663] [2019-10-13 19:46:09,759 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:09,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:09,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129446035] [2019-10-13 19:46:09,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:46:09,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:09,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:46:09,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:46:09,760 INFO L87 Difference]: Start difference. First operand 9824 states and 14759 transitions. Second operand 7 states. [2019-10-13 19:46:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:12,047 INFO L93 Difference]: Finished difference Result 20559 states and 30871 transitions. [2019-10-13 19:46:12,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:12,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2019-10-13 19:46:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:12,066 INFO L225 Difference]: With dead ends: 20559 [2019-10-13 19:46:12,066 INFO L226 Difference]: Without dead ends: 11316 [2019-10-13 19:46:12,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:46:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11316 states. [2019-10-13 19:46:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11316 to 7633. [2019-10-13 19:46:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7633 states. [2019-10-13 19:46:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 11363 transitions. [2019-10-13 19:46:12,943 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 11363 transitions. Word has length 59 [2019-10-13 19:46:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:12,943 INFO L462 AbstractCegarLoop]: Abstraction has 7633 states and 11363 transitions. [2019-10-13 19:46:12,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:46:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 11363 transitions. [2019-10-13 19:46:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 19:46:12,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:12,945 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:12,946 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash -226647092, now seen corresponding path program 1 times [2019-10-13 19:46:12,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:12,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477432811] [2019-10-13 19:46:12,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:12,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:12,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:13,117 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-13 19:46:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:13,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477432811] [2019-10-13 19:46:13,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:13,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:46:13,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750284303] [2019-10-13 19:46:13,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:13,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:13,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:13,146 INFO L87 Difference]: Start difference. First operand 7633 states and 11363 transitions. Second operand 6 states. [2019-10-13 19:46:13,720 WARN L191 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2019-10-13 19:46:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:46:15,432 INFO L93 Difference]: Finished difference Result 18447 states and 27375 transitions. [2019-10-13 19:46:15,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:46:15,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2019-10-13 19:46:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:46:15,449 INFO L225 Difference]: With dead ends: 18447 [2019-10-13 19:46:15,450 INFO L226 Difference]: Without dead ends: 10894 [2019-10-13 19:46:15,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:46:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10894 states. [2019-10-13 19:46:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10894 to 7633. [2019-10-13 19:46:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7633 states. [2019-10-13 19:46:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7633 states to 7633 states and 11259 transitions. [2019-10-13 19:46:16,514 INFO L78 Accepts]: Start accepts. Automaton has 7633 states and 11259 transitions. Word has length 59 [2019-10-13 19:46:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:46:16,515 INFO L462 AbstractCegarLoop]: Abstraction has 7633 states and 11259 transitions. [2019-10-13 19:46:16,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:46:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 7633 states and 11259 transitions. [2019-10-13 19:46:16,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 19:46:16,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:46:16,517 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:46:16,517 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:46:16,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:46:16,518 INFO L82 PathProgramCache]: Analyzing trace with hash 758768658, now seen corresponding path program 1 times [2019-10-13 19:46:16,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:46:16,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693424369] [2019-10-13 19:46:16,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:16,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:46:16,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:46:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:46:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:46:16,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693424369] [2019-10-13 19:46:16,678 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:46:16,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:46:16,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699579763] [2019-10-13 19:46:16,678 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:46:16,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:46:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:46:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:46:16,679 INFO L87 Difference]: Start difference. First operand 7633 states and 11259 transitions. Second operand 6 states.