/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:13:51,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:13:51,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:13:51,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:13:51,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:13:51,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:13:51,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:13:51,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:13:51,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:13:51,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:13:51,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:13:52,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:13:52,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:13:52,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:13:52,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:13:52,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:13:52,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:13:52,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:13:52,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:13:52,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:13:52,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:13:52,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:13:52,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:13:52,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:13:52,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:13:52,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:13:52,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:13:52,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:13:52,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:13:52,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:13:52,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:13:52,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:13:52,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:13:52,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:13:52,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:13:52,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:13:52,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:13:52,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:13:52,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:13:52,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:13:52,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:13:52,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:13:52,075 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:13:52,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:13:52,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:13:52,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:13:52,081 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:13:52,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:13:52,081 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:13:52,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:13:52,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:13:52,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:13:52,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:13:52,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:13:52,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:13:52,082 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:13:52,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:13:52,083 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:13:52,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:13:52,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:13:52,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:13:52,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:13:52,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:13:52,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:52,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:13:52,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:13:52,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:13:52,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:13:52,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:13:52,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:13:52,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 22:13:52,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:13:52,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:13:52,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:13:52,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:13:52,379 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:13:52,380 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:13:52,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6558254e/9d80a439976d4bfdbdb966b6c7a61442/FLAGef77270f6 [2019-11-06 22:13:53,077 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:13:53,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:13:53,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6558254e/9d80a439976d4bfdbdb966b6c7a61442/FLAGef77270f6 [2019-11-06 22:13:53,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6558254e/9d80a439976d4bfdbdb966b6c7a61442 [2019-11-06 22:13:53,264 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:13:53,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:13:53,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:53,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:13:53,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:13:53,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:53" (1/1) ... [2019-11-06 22:13:53,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53375f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:53, skipping insertion in model container [2019-11-06 22:13:53,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:13:53" (1/1) ... [2019-11-06 22:13:53,285 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:13:53,360 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:13:54,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:54,043 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:13:54,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:13:54,432 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:13:54,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54 WrapperNode [2019-11-06 22:13:54,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:13:54,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:13:54,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:13:54,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:13:54,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... [2019-11-06 22:13:54,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:13:54,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:13:54,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:13:54,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:13:54,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:13:54,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:13:54,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:13:54,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:13:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:13:54,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-11-06 22:13:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-06 22:13:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-11-06 22:13:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-11-06 22:13:54,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 22:13:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-11-06 22:13:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-11-06 22:13:54,701 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-11-06 22:13:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-11-06 22:13:54,702 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-11-06 22:13:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-11-06 22:13:54,703 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-06 22:13:54,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:13:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:13:54,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:13:56,849 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:13:56,849 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-06 22:13:56,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:56 BoogieIcfgContainer [2019-11-06 22:13:56,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:13:56,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:13:56,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:13:56,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:13:56,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:13:53" (1/3) ... [2019-11-06 22:13:56,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c27709e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:56, skipping insertion in model container [2019-11-06 22:13:56,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:13:54" (2/3) ... [2019-11-06 22:13:56,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c27709e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:13:56, skipping insertion in model container [2019-11-06 22:13:56,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:13:56" (3/3) ... [2019-11-06 22:13:56,859 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2019-11-06 22:13:56,868 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:13:56,877 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-06 22:13:56,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-06 22:13:56,914 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:13:56,914 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:13:56,914 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:13:56,914 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:13:56,914 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:13:56,914 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:13:56,914 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:13:56,915 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:13:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states. [2019-11-06 22:13:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 22:13:56,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:13:56,959 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] [2019-11-06 22:13:56,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:13:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:13:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -437253728, now seen corresponding path program 1 times [2019-11-06 22:13:56,976 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:13:56,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623518715] [2019-11-06 22:13:56,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:13:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,022 WARN L191 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:13:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:13:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:13:58,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623518715] [2019-11-06 22:13:58,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:13:58,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:13:58,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056550898] [2019-11-06 22:13:58,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:13:58,092 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:13:58,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:13:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:13:58,108 INFO L87 Difference]: Start difference. First operand 446 states. Second operand 4 states. [2019-11-06 22:13:58,713 WARN L191 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2019-11-06 22:14:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:01,790 INFO L93 Difference]: Finished difference Result 701 states and 1229 transitions. [2019-11-06 22:14:01,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:01,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2019-11-06 22:14:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:01,812 INFO L225 Difference]: With dead ends: 701 [2019-11-06 22:14:01,812 INFO L226 Difference]: Without dead ends: 544 [2019-11-06 22:14:01,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2019-11-06 22:14:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 538. [2019-11-06 22:14:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-06 22:14:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 713 transitions. [2019-11-06 22:14:01,902 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 713 transitions. Word has length 53 [2019-11-06 22:14:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:01,902 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 713 transitions. [2019-11-06 22:14:01,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 713 transitions. [2019-11-06 22:14:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 22:14:01,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:01,908 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] [2019-11-06 22:14:01,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash 511312781, now seen corresponding path program 1 times [2019-11-06 22:14:01,909 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:01,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065650045] [2019-11-06 22:14:01,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:02,600 WARN L191 SmtUtils]: Spent 499.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:02,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065650045] [2019-11-06 22:14:02,625 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:02,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:02,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547117902] [2019-11-06 22:14:02,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:02,628 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:02,628 INFO L87 Difference]: Start difference. First operand 538 states and 713 transitions. Second operand 4 states. [2019-11-06 22:14:03,155 WARN L191 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2019-11-06 22:14:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:05,332 INFO L93 Difference]: Finished difference Result 939 states and 1299 transitions. [2019-11-06 22:14:05,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:05,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2019-11-06 22:14:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:05,361 INFO L225 Difference]: With dead ends: 939 [2019-11-06 22:14:05,361 INFO L226 Difference]: Without dead ends: 717 [2019-11-06 22:14:05,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2019-11-06 22:14:05,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 711. [2019-11-06 22:14:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 711 states. [2019-11-06 22:14:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 964 transitions. [2019-11-06 22:14:05,406 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 964 transitions. Word has length 53 [2019-11-06 22:14:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:05,406 INFO L462 AbstractCegarLoop]: Abstraction has 711 states and 964 transitions. [2019-11-06 22:14:05,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 964 transitions. [2019-11-06 22:14:05,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 22:14:05,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:05,410 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] [2019-11-06 22:14:05,410 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:05,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2083769958, now seen corresponding path program 1 times [2019-11-06 22:14:05,411 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:05,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192261460] [2019-11-06 22:14:05,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,125 WARN L191 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:06,157 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192261460] [2019-11-06 22:14:06,157 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:06,157 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 22:14:06,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055824] [2019-11-06 22:14:06,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:14:06,159 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:14:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:14:06,159 INFO L87 Difference]: Start difference. First operand 711 states and 964 transitions. Second operand 11 states. [2019-11-06 22:14:06,802 WARN L191 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 275 [2019-11-06 22:14:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:11,966 INFO L93 Difference]: Finished difference Result 2245 states and 3240 transitions. [2019-11-06 22:14:11,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 22:14:11,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-06 22:14:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:11,978 INFO L225 Difference]: With dead ends: 2245 [2019-11-06 22:14:11,978 INFO L226 Difference]: Without dead ends: 2114 [2019-11-06 22:14:11,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2019-11-06 22:14:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-11-06 22:14:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 722. [2019-11-06 22:14:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 722 states. [2019-11-06 22:14:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 978 transitions. [2019-11-06 22:14:12,056 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 978 transitions. Word has length 53 [2019-11-06 22:14:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:12,058 INFO L462 AbstractCegarLoop]: Abstraction has 722 states and 978 transitions. [2019-11-06 22:14:12,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:14:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 978 transitions. [2019-11-06 22:14:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 22:14:12,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:12,063 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] [2019-11-06 22:14:12,064 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash -952135619, now seen corresponding path program 1 times [2019-11-06 22:14:12,064 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:12,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587649085] [2019-11-06 22:14:12,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:12,690 WARN L191 SmtUtils]: Spent 521.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:12,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587649085] [2019-11-06 22:14:12,723 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:12,724 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:14:12,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480976736] [2019-11-06 22:14:12,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:14:12,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:14:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:14:12,725 INFO L87 Difference]: Start difference. First operand 722 states and 978 transitions. Second operand 4 states. [2019-11-06 22:14:13,312 WARN L191 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2019-11-06 22:14:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:15,874 INFO L93 Difference]: Finished difference Result 1389 states and 1943 transitions. [2019-11-06 22:14:15,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 22:14:15,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-11-06 22:14:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:15,881 INFO L225 Difference]: With dead ends: 1389 [2019-11-06 22:14:15,881 INFO L226 Difference]: Without dead ends: 1060 [2019-11-06 22:14:15,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:14:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2019-11-06 22:14:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1053. [2019-11-06 22:14:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1053 states. [2019-11-06 22:14:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1444 transitions. [2019-11-06 22:14:15,937 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1444 transitions. Word has length 54 [2019-11-06 22:14:15,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:15,938 INFO L462 AbstractCegarLoop]: Abstraction has 1053 states and 1444 transitions. [2019-11-06 22:14:15,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:14:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1444 transitions. [2019-11-06 22:14:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 22:14:15,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:15,941 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] [2019-11-06 22:14:15,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1058176550, now seen corresponding path program 1 times [2019-11-06 22:14:15,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:15,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049243428] [2019-11-06 22:14:15,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:16,653 WARN L191 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:16,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049243428] [2019-11-06 22:14:16,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:16,697 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-11-06 22:14:16,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377066731] [2019-11-06 22:14:16,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 22:14:16,700 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 22:14:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:14:16,701 INFO L87 Difference]: Start difference. First operand 1053 states and 1444 transitions. Second operand 11 states. [2019-11-06 22:14:17,925 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 280 DAG size of output: 275 [2019-11-06 22:14:21,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:21,698 INFO L93 Difference]: Finished difference Result 2584 states and 3635 transitions. [2019-11-06 22:14:21,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 22:14:21,699 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2019-11-06 22:14:21,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:21,710 INFO L225 Difference]: With dead ends: 2584 [2019-11-06 22:14:21,711 INFO L226 Difference]: Without dead ends: 2367 [2019-11-06 22:14:21,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2019-11-06 22:14:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2019-11-06 22:14:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1053. [2019-11-06 22:14:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1053 states. [2019-11-06 22:14:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1444 transitions. [2019-11-06 22:14:21,784 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1444 transitions. Word has length 54 [2019-11-06 22:14:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:21,784 INFO L462 AbstractCegarLoop]: Abstraction has 1053 states and 1444 transitions. [2019-11-06 22:14:21,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 22:14:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1444 transitions. [2019-11-06 22:14:21,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 22:14:21,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:21,787 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] [2019-11-06 22:14:21,787 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:21,788 INFO L82 PathProgramCache]: Analyzing trace with hash -609407585, now seen corresponding path program 1 times [2019-11-06 22:14:21,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:21,788 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535263618] [2019-11-06 22:14:21,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:22,566 WARN L191 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:22,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535263618] [2019-11-06 22:14:22,596 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:22,596 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-06 22:14:22,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185982201] [2019-11-06 22:14:22,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 22:14:22,597 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 22:14:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:14:22,598 INFO L87 Difference]: Start difference. First operand 1053 states and 1444 transitions. Second operand 13 states. [2019-11-06 22:14:23,840 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 288 DAG size of output: 286 [2019-11-06 22:14:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:14:29,966 INFO L93 Difference]: Finished difference Result 3802 states and 5406 transitions. [2019-11-06 22:14:29,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 22:14:29,971 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2019-11-06 22:14:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:14:29,992 INFO L225 Difference]: With dead ends: 3802 [2019-11-06 22:14:29,993 INFO L226 Difference]: Without dead ends: 3604 [2019-11-06 22:14:29,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2019-11-06 22:14:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2019-11-06 22:14:30,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 1069. [2019-11-06 22:14:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-11-06 22:14:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1467 transitions. [2019-11-06 22:14:30,096 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1467 transitions. Word has length 54 [2019-11-06 22:14:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:14:30,098 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1467 transitions. [2019-11-06 22:14:30,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 22:14:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1467 transitions. [2019-11-06 22:14:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 22:14:30,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:14:30,101 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] [2019-11-06 22:14:30,101 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:14:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:14:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 963049592, now seen corresponding path program 1 times [2019-11-06 22:14:30,102 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 22:14:30,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398671291] [2019-11-06 22:14:30,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:14:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:30,755 WARN L191 SmtUtils]: Spent 462.00 ms on a formula simplification that was a NOOP. DAG size: 262 [2019-11-06 22:14:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:14:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:14:30,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398671291] [2019-11-06 22:14:30,781 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:14:30,781 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 22:14:30,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026878709] [2019-11-06 22:14:30,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 22:14:30,782 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 22:14:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 22:14:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:14:30,783 INFO L87 Difference]: Start difference. First operand 1069 states and 1467 transitions. Second operand 10 states. [2019-11-06 22:14:31,335 WARN L191 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 268