/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:54:30,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:54:30,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:54:30,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:54:30,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:54:30,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:54:30,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:54:30,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:54:30,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:54:30,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:54:30,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:54:30,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:54:30,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:54:30,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:54:30,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:54:30,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:54:30,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:54:30,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:54:30,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:54:30,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:54:30,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:54:30,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:54:30,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:54:30,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:54:30,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:54:30,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:54:30,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:54:30,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:54:30,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:54:30,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 02:54:30,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:54:30,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:54:30,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:54:30,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:54:30,596 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:54:30,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:54:30,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:54:30,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:54:30,600 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:54:30,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:54:30,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:54:30,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:54:30,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:54:30,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:54:30,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:54:30,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:54:30,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:54:30,603 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:54:30,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:54:30,603 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:54:30,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:54:30,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:54:30,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:54:30,604 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:54:30,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:54:30,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:54:30,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:54:30,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:54:30,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:54:30,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:54:30,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:54:30,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:54:30,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:54:30,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:54:30,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:54:30,955 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:54:30,958 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:54:30,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:54:30,960 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:54:30,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-08-19 02:54:31,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e0cbc50/daae81cb8c6c42dd8190b2d77b7c0993/FLAG7142eb994 [2020-08-19 02:54:31,573 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:54:31,573 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2020-08-19 02:54:31,586 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e0cbc50/daae81cb8c6c42dd8190b2d77b7c0993/FLAG7142eb994 [2020-08-19 02:54:31,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44e0cbc50/daae81cb8c6c42dd8190b2d77b7c0993 [2020-08-19 02:54:31,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:54:31,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:54:31,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:54:31,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:54:31,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:54:31,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:54:31" (1/1) ... [2020-08-19 02:54:31,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24cd3f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:31, skipping insertion in model container [2020-08-19 02:54:31,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:54:31" (1/1) ... [2020-08-19 02:54:31,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:54:31,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:54:32,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:54:32,254 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:54:32,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:54:32,451 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:54:32,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32 WrapperNode [2020-08-19 02:54:32,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:54:32,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:54:32,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:54:32,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:54:32,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... [2020-08-19 02:54:32,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:54:32,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:54:32,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:54:32,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:54:32,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-19 02:54:32,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:54:32,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:54:32,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:54:32,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:54:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-19 02:54:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-19 02:54:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:54:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:54:32,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:54:32,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-19 02:54:32,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:54:35,376 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:54:35,377 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:54:35,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:54:35 BoogieIcfgContainer [2020-08-19 02:54:35,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:54:35,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:54:35,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:54:35,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:54:35,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:54:31" (1/3) ... [2020-08-19 02:54:35,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bf414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:54:35, skipping insertion in model container [2020-08-19 02:54:35,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:54:32" (2/3) ... [2020-08-19 02:54:35,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bf414c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:54:35, skipping insertion in model container [2020-08-19 02:54:35,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:54:35" (3/3) ... [2020-08-19 02:54:35,391 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2020-08-19 02:54:35,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:54:35,412 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:54:35,428 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:54:35,453 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:54:35,453 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:54:35,454 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:54:35,454 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:54:35,454 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:54:35,455 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:54:35,455 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:54:35,455 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:54:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-19 02:54:35,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:54:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:35,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:35,482 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:35,488 INFO L82 PathProgramCache]: Analyzing trace with hash 316900320, now seen corresponding path program 1 times [2020-08-19 02:54:35,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:35,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292299495] [2020-08-19 02:54:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:36,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:36,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292299495] [2020-08-19 02:54:36,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:54:36,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:54:36,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087722413] [2020-08-19 02:54:36,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:54:36,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:54:36,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:54:36,060 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-08-19 02:54:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:38,255 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-08-19 02:54:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:54:38,257 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:54:38,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:38,267 INFO L225 Difference]: With dead ends: 46 [2020-08-19 02:54:38,267 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 02:54:38,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:54:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 02:54:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2020-08-19 02:54:38,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 02:54:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 02:54:38,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 02:54:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:38,313 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 02:54:38,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:54:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 02:54:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:54:38,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:38,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:38,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:54:38,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:38,315 INFO L82 PathProgramCache]: Analyzing trace with hash 316483246, now seen corresponding path program 1 times [2020-08-19 02:54:38,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:38,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103845362] [2020-08-19 02:54:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:38,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:38,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103845362] [2020-08-19 02:54:38,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:54:38,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:54:38,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70558420] [2020-08-19 02:54:38,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:54:38,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:54:38,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:54:38,491 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-08-19 02:54:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:40,612 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-08-19 02:54:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:54:40,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:54:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:40,615 INFO L225 Difference]: With dead ends: 28 [2020-08-19 02:54:40,615 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 02:54:40,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:54:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 02:54:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2020-08-19 02:54:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-19 02:54:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-19 02:54:40,626 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-08-19 02:54:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:40,627 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-19 02:54:40,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:54:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-19 02:54:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:54:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:40,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:40,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:54:40,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash 625969832, now seen corresponding path program 1 times [2020-08-19 02:54:40,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:40,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932817037] [2020-08-19 02:54:40,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:40,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:40,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932817037] [2020-08-19 02:54:40,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:40,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:54:40,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662080446] [2020-08-19 02:54:40,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:54:40,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:40,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:54:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:54:40,864 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-08-19 02:54:45,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:45,072 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-08-19 02:54:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:54:45,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 02:54:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:45,074 INFO L225 Difference]: With dead ends: 40 [2020-08-19 02:54:45,074 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 02:54:45,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:54:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 02:54:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-08-19 02:54:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 02:54:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-08-19 02:54:45,097 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-08-19 02:54:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:45,097 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-08-19 02:54:45,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:54:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-08-19 02:54:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 02:54:45,098 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:45,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:45,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:54:45,100 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:45,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1878874992, now seen corresponding path program 2 times [2020-08-19 02:54:45,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:45,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631657706] [2020-08-19 02:54:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:45,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:45,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631657706] [2020-08-19 02:54:45,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:45,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:54:45,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992720090] [2020-08-19 02:54:45,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:54:45,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:45,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:54:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:54:45,325 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-08-19 02:54:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:54:51,572 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-08-19 02:54:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:54:51,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 02:54:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:54:51,574 INFO L225 Difference]: With dead ends: 46 [2020-08-19 02:54:51,574 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 02:54:51,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:54:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 02:54:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-08-19 02:54:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 02:54:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-08-19 02:54:51,587 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-08-19 02:54:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:54:51,587 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-08-19 02:54:51,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:54:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-08-19 02:54:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 02:54:51,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:54:51,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:54:51,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:54:51,591 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:54:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:54:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1460832712, now seen corresponding path program 3 times [2020-08-19 02:54:51,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:54:51,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129806342] [2020-08-19 02:54:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:54:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:51,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:54:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:54:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:54:51,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129806342] [2020-08-19 02:54:51,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:54:51,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:54:51,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247440353] [2020-08-19 02:54:51,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:54:51,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:54:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:54:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:54:51,848 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 8 states. [2020-08-19 02:55:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:00,142 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-08-19 02:55:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:55:00,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 02:55:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:00,146 INFO L225 Difference]: With dead ends: 52 [2020-08-19 02:55:00,146 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 02:55:00,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:55:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 02:55:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-08-19 02:55:00,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 02:55:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-08-19 02:55:00,155 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-08-19 02:55:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:00,156 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-08-19 02:55:00,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:55:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-08-19 02:55:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 02:55:00,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:00,157 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:00,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:55:00,158 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 599808768, now seen corresponding path program 4 times [2020-08-19 02:55:00,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:00,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005753006] [2020-08-19 02:55:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:00,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:00,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005753006] [2020-08-19 02:55:00,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:55:00,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:55:00,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453337915] [2020-08-19 02:55:00,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:55:00,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:55:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:55:00,386 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-08-19 02:55:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:10,769 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-08-19 02:55:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:55:10,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 02:55:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:10,771 INFO L225 Difference]: With dead ends: 58 [2020-08-19 02:55:10,772 INFO L226 Difference]: Without dead ends: 48 [2020-08-19 02:55:10,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:55:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-19 02:55:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-08-19 02:55:10,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-19 02:55:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-08-19 02:55:10,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-08-19 02:55:10,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:10,782 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-08-19 02:55:10,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:55:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-08-19 02:55:10,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 02:55:10,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:10,783 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:10,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:55:10,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash 431393224, now seen corresponding path program 5 times [2020-08-19 02:55:10,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:10,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660344646] [2020-08-19 02:55:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:10,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:10,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660344646] [2020-08-19 02:55:10,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:55:10,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:55:10,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609951132] [2020-08-19 02:55:10,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:55:10,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:55:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:55:10,990 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 10 states. [2020-08-19 02:55:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:23,401 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-08-19 02:55:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:55:23,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 02:55:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:23,403 INFO L225 Difference]: With dead ends: 64 [2020-08-19 02:55:23,403 INFO L226 Difference]: Without dead ends: 54 [2020-08-19 02:55:23,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:55:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-19 02:55:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-19 02:55:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 02:55:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-08-19 02:55:23,412 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-08-19 02:55:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:23,413 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-08-19 02:55:23,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:55:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-08-19 02:55:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 02:55:23,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:23,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:23,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:55:23,415 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -240090480, now seen corresponding path program 6 times [2020-08-19 02:55:23,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:23,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294560847] [2020-08-19 02:55:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:23,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294560847] [2020-08-19 02:55:23,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:55:23,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:55:23,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014755311] [2020-08-19 02:55:23,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:55:23,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:55:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:55:23,654 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 11 states. [2020-08-19 02:55:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:55:38,130 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-08-19 02:55:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:55:38,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 02:55:38,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:55:38,134 INFO L225 Difference]: With dead ends: 70 [2020-08-19 02:55:38,135 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 02:55:38,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:55:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 02:55:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-08-19 02:55:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 02:55:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-08-19 02:55:38,145 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-08-19 02:55:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:55:38,146 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-08-19 02:55:38,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:55:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-08-19 02:55:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 02:55:38,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:55:38,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:55:38,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:55:38,149 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:55:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:55:38,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2010200744, now seen corresponding path program 7 times [2020-08-19 02:55:38,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:55:38,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352718059] [2020-08-19 02:55:38,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:55:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:38,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:55:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:55:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:55:38,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352718059] [2020-08-19 02:55:38,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:55:38,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:55:38,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570036236] [2020-08-19 02:55:38,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:55:38,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:55:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:55:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:55:38,473 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 12 states.