/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:17:00,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:17:00,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:17:01,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:17:01,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:17:01,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:17:01,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:17:01,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:17:01,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:17:01,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:17:01,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:17:01,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:17:01,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:17:01,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:17:01,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:17:01,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:17:01,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:17:01,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:17:01,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:17:01,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:17:01,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:17:01,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:17:01,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:17:01,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:17:01,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:17:01,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:17:01,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:17:01,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:17:01,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:17:01,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 18:17:01,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:17:01,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:17:01,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:17:01,069 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 [2020-08-21 18:17:01,109 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:17:01,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:17:01,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:17:01,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:17:01,112 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:17:01,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:17:01,113 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:17:01,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:17:01,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:17:01,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:17:01,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:17:01,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:17:01,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:17:01,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:17:01,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:17:01,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:17:01,116 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:17:01,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:17:01,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:17:01,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:17:01,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:17:01,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:17:01,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:17:01,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:17:01,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:17:01,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:17:01,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:17:01,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:17:01,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:17:01,118 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=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:17:01,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:17:01,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:17:01,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:17:01,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:17:01,448 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:17:01,448 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 18:17:01,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c54f26e4/659fcc4c00b442218d0b287c76c0c112/FLAG82c6e40b9 [2020-08-21 18:17:02,049 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:17:02,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 18:17:02,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c54f26e4/659fcc4c00b442218d0b287c76c0c112/FLAG82c6e40b9 [2020-08-21 18:17:02,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c54f26e4/659fcc4c00b442218d0b287c76c0c112 [2020-08-21 18:17:02,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:17:02,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:17:02,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:02,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:17:02,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:17:02,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:02" (1/1) ... [2020-08-21 18:17:02,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6870637f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:02, skipping insertion in model container [2020-08-21 18:17:02,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:17:02" (1/1) ... [2020-08-21 18:17:02,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:17:02,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:17:02,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:02,886 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:17:03,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:17:03,034 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:17:03,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03 WrapperNode [2020-08-21 18:17:03,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:17:03,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:17:03,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:17:03,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:17:03,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (1/1) ... [2020-08-21 18:17:03,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:17:03,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:17:03,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:17:03,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:17:03,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (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 [2020-08-21 18:17:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:17:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:17:03,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:17:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:17:03,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:17:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:17:03,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 18:17:06,261 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:17:06,261 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:17:06,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:06 BoogieIcfgContainer [2020-08-21 18:17:06,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:17:06,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:17:06,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:17:06,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:17:06,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:17:02" (1/3) ... [2020-08-21 18:17:06,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7393b859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:06, skipping insertion in model container [2020-08-21 18:17:06,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:17:03" (2/3) ... [2020-08-21 18:17:06,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7393b859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:17:06, skipping insertion in model container [2020-08-21 18:17:06,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:17:06" (3/3) ... [2020-08-21 18:17:06,276 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-21 18:17:06,286 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:17:06,293 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:17:06,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:17:06,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:17:06,332 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:17:06,332 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:17:06,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:17:06,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:17:06,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:17:06,333 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:17:06,333 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:17:06,352 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 18:17:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 18:17:06,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:06,362 INFO L422 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] [2020-08-21 18:17:06,362 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:06,368 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-21 18:17:06,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:06,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193108946] [2020-08-21 18:17:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:07,277 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-21 18:17:07,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:07,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193108946] [2020-08-21 18:17:07,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:17:07,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 18:17:07,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830391794] [2020-08-21 18:17:07,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 18:17:07,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 18:17:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 18:17:07,340 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-21 18:17:07,603 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 18:17:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:28,669 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-21 18:17:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:17:28,673 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 18:17:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:28,689 INFO L225 Difference]: With dead ends: 92 [2020-08-21 18:17:28,690 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 18:17:28,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:17:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 18:17:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 18:17:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 18:17:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-21 18:17:28,754 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-21 18:17:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:28,755 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-21 18:17:28,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 18:17:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-21 18:17:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 18:17:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:28,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:28,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:17:28,759 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-21 18:17:28,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:28,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180004702] [2020-08-21 18:17:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:29,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180004702] [2020-08-21 18:17:29,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:29,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:17:29,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982525714] [2020-08-21 18:17:29,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:17:29,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:17:29,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:17:29,389 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-21 18:17:29,657 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 18:17:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:17:52,407 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-21 18:17:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:17:52,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 18:17:52,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:17:52,410 INFO L225 Difference]: With dead ends: 65 [2020-08-21 18:17:52,410 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 18:17:52,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-21 18:17:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 18:17:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-21 18:17:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 18:17:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-21 18:17:52,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-21 18:17:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:17:52,421 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-21 18:17:52,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:17:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-21 18:17:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 18:17:52,423 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:17:52,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:17:52,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:17:52,424 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:17:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:17:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-21 18:17:52,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:17:52,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482876419] [2020-08-21 18:17:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:17:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:52,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:17:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:17:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:17:52,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482876419] [2020-08-21 18:17:52,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:17:52,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 18:17:52,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631112011] [2020-08-21 18:17:52,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 18:17:52,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:17:53,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 18:17:53,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 18:17:53,000 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-21 18:18:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:18:18,162 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-21 18:18:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 18:18:18,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-21 18:18:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:18:18,168 INFO L225 Difference]: With dead ends: 70 [2020-08-21 18:18:18,168 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 18:18:18,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-08-21 18:18:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 18:18:18,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-21 18:18:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 18:18:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-21 18:18:18,178 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-21 18:18:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:18:18,178 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-21 18:18:18,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 18:18:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-21 18:18:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 18:18:18,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:18:18,180 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:18:18,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:18:18,181 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:18:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:18:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-21 18:18:18,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:18:18,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402934621] [2020-08-21 18:18:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:18:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:18:18,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:18:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:18:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:18:18,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402934621] [2020-08-21 18:18:18,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:18:18,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 18:18:18,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739179617] [2020-08-21 18:18:18,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 18:18:18,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:18:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 18:18:18,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:18:18,713 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states. [2020-08-21 18:18:18,994 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111