/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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 16:40:26,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:40:26,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:40:26,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:40:26,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:40:26,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:40:26,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:40:26,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:40:26,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:40:26,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:40:26,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:40:26,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:40:26,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:40:26,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:40:26,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:40:26,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:40:26,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:40:26,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:40:26,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:40:26,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:40:26,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:40:26,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:40:26,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:40:26,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:40:26,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:40:26,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:40:26,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:40:26,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:40:26,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:40:26,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:40:26,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:40:26,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:40:26,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:40:26,128 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 16:40:26,173 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:40:26,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:40:26,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:40:26,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:40:26,175 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:40:26,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:40:26,176 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:40:26,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:40:26,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:40:26,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:40:26,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:40:26,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:40:26,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:40:26,179 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:40:26,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:40:26,179 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:40:26,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:40:26,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:40:26,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:40:26,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:40:26,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:40:26,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:40:26,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:40:26,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:40:26,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:40:26,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:40:26,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:40:26,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:40:26,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:40:26,182 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:40:26,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:40:26,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:40:26,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:40:26,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:40:26,530 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:40:26,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 16:40:26,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bb44590a/77fc3d5824c741078fde8a9e29f42f1f/FLAGb03653a36 [2020-08-21 16:40:27,142 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:40:27,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-08-21 16:40:27,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bb44590a/77fc3d5824c741078fde8a9e29f42f1f/FLAGb03653a36 [2020-08-21 16:40:27,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bb44590a/77fc3d5824c741078fde8a9e29f42f1f [2020-08-21 16:40:27,472 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:40:27,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:40:27,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:27,475 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:40:27,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:40:27,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:27" (1/1) ... [2020-08-21 16:40:27,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4e7937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:27, skipping insertion in model container [2020-08-21 16:40:27,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:27" (1/1) ... [2020-08-21 16:40:27,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:40:27,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:40:27,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:27,924 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:40:28,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:28,051 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:40:28,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28 WrapperNode [2020-08-21 16:40:28,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:28,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:40:28,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:40:28,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:40:28,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (1/1) ... [2020-08-21 16:40:28,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:40:28,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:40:28,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:40:28,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:40:28,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (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 16:40:28,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:40:28,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:40:28,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:40:28,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 16:40:28,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:40:28,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 16:40:28,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 16:40:31,298 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:40:31,299 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:40:31,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:31 BoogieIcfgContainer [2020-08-21 16:40:31,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:40:31,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:40:31,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:40:31,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:40:31,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:40:27" (1/3) ... [2020-08-21 16:40:31,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ac2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:31, skipping insertion in model container [2020-08-21 16:40:31,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:28" (2/3) ... [2020-08-21 16:40:31,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@550ac2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:31, skipping insertion in model container [2020-08-21 16:40:31,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:31" (3/3) ... [2020-08-21 16:40:31,312 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-08-21 16:40:31,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:40:31,330 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:40:31,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:40:31,368 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:40:31,369 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:40:31,369 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:40:31,369 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:40:31,369 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:40:31,370 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:40:31,370 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:40:31,370 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:40:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-08-21 16:40:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 16:40:31,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:31,398 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 16:40:31,399 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-08-21 16:40:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:31,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171366909] [2020-08-21 16:40:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:32,354 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-21 16:40:32,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:32,394 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 16:40:32,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171366909] [2020-08-21 16:40:32,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:32,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-21 16:40:32,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209867842] [2020-08-21 16:40:32,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:40:32,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:40:32,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:40:32,424 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 14 states. [2020-08-21 16:40:32,735 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 16:40:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:53,845 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2020-08-21 16:40:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:40:53,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 16:40:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:53,858 INFO L225 Difference]: With dead ends: 92 [2020-08-21 16:40:53,858 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 16:40:53,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-21 16:40:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 16:40:53,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 16:40:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 16:40:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-08-21 16:40:53,909 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-08-21 16:40:53,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:53,910 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-08-21 16:40:53,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:40:53,910 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-08-21 16:40:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 16:40:53,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:53,913 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 16:40:53,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:40:53,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:53,914 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-08-21 16:40:53,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:53,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995218080] [2020-08-21 16:40:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:54,400 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 16:40:54,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995218080] [2020-08-21 16:40:54,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:54,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:40:54,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732798858] [2020-08-21 16:40:54,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:40:54,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:40:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:40:54,405 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 15 states. [2020-08-21 16:40:54,670 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-08-21 16:41:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:17,433 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-08-21 16:41:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 16:41:17,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 16:41:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:17,436 INFO L225 Difference]: With dead ends: 65 [2020-08-21 16:41:17,436 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 16:41:17,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-21 16:41:17,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 16:41:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-08-21 16:41:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 16:41:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-08-21 16:41:17,455 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2020-08-21 16:41:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:17,455 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-08-21 16:41:17,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:41:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-08-21 16:41:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-21 16:41:17,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:17,460 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 16:41:17,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:41:17,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1610392358, now seen corresponding path program 2 times [2020-08-21 16:41:17,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:17,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145207922] [2020-08-21 16:41:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:18,012 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-08-21 16:41:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:18,034 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 16:41:18,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145207922] [2020-08-21 16:41:18,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:41:18,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 16:41:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348787742] [2020-08-21 16:41:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 16:41:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 16:41:18,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-08-21 16:41:18,037 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2020-08-21 16:41:43,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:43,149 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-08-21 16:41:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:41:43,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-08-21 16:41:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:43,154 INFO L225 Difference]: With dead ends: 70 [2020-08-21 16:41:43,156 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 16:41:43,158 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 16:41:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 16:41:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-08-21 16:41:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 16:41:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-08-21 16:41:43,188 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2020-08-21 16:41:43,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:43,188 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-08-21 16:41:43,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 16:41:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-08-21 16:41:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 16:41:43,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:43,191 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 16:41:43,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:41:43,191 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:43,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1809942103, now seen corresponding path program 3 times [2020-08-21 16:41:43,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:43,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83778628] [2020-08-21 16:41:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:43,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:43,828 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 16:41:43,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83778628] [2020-08-21 16:41:43,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:41:43,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 16:41:43,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123961517] [2020-08-21 16:41:43,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 16:41:43,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:43,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 16:41:43,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:41:43,832 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 17 states.