/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/loops-crafted-1/sumt2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:40:54,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:40:54,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:40:54,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:40:54,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:40:54,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:40:54,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:40:54,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:40:54,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:40:54,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:40:54,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:40:54,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:40:54,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:40:54,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:40:54,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:40:54,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:40:54,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:40:54,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:40:54,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:40:54,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:40:54,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:40:54,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:40:54,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:40:54,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:40:54,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:40:54,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:40:54,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:40:54,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:40:54,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:40:54,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:40:54,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:40:54,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:40:54,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:40:54,373 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 16:40:54,415 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:40:54,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:40:54,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:40:54,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:40:54,418 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:40:54,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:40:54,419 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:40:54,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:40:54,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:40:54,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:40:54,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:40:54,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:40:54,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:40:54,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:40:54,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:40:54,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:40:54,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:40:54,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:40:54,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:40:54,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:40:54,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:40:54,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:40:54,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:40:54,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:40:54,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:40:54,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:40:54,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:40:54,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:40:54,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:40:54,429 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 16:40:54,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:40:54,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:40:54,768 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:40:54,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:40:54,771 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:40:54,772 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-08-21 16:40:54,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62b849969/bb1d8dba310c493d961c38871a2132d6/FLAG1d0f7b910 [2020-08-21 16:40:55,272 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:40:55,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt2.c [2020-08-21 16:40:55,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62b849969/bb1d8dba310c493d961c38871a2132d6/FLAG1d0f7b910 [2020-08-21 16:40:55,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/62b849969/bb1d8dba310c493d961c38871a2132d6 [2020-08-21 16:40:55,688 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:40:55,690 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:40:55,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:55,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:40:55,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:40:55,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:55,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@522d3de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55, skipping insertion in model container [2020-08-21 16:40:55,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:55,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:40:55,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:40:55,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:55,916 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:40:55,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:40:55,946 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:40:55,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55 WrapperNode [2020-08-21 16:40:55,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:40:55,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:40:55,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:40:55,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:40:55,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:55,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (1/1) ... [2020-08-21 16:40:56,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:40:56,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:40:56,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:40:56,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:40:56,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (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 16:40:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:40:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:40:56,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 16:40:56,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:40:56,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:40:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:40:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 16:40:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 16:40:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:40:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:40:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:40:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:40:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:40:56,314 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:40:56,314 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:40:56,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:56 BoogieIcfgContainer [2020-08-21 16:40:56,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:40:56,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:40:56,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:40:56,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:40:56,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:40:55" (1/3) ... [2020-08-21 16:40:56,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb8f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:56, skipping insertion in model container [2020-08-21 16:40:56,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:40:55" (2/3) ... [2020-08-21 16:40:56,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16cb8f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:40:56, skipping insertion in model container [2020-08-21 16:40:56,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:40:56" (3/3) ... [2020-08-21 16:40:56,326 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt2.c [2020-08-21 16:40:56,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:40:56,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:40:56,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:40:56,378 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:40:56,378 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:40:56,378 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:40:56,378 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:40:56,378 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:40:56,379 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:40:56,379 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:40:56,379 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:40:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-21 16:40:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 16:40:56,400 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:56,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:56,401 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:56,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:56,406 INFO L82 PathProgramCache]: Analyzing trace with hash -647006370, now seen corresponding path program 1 times [2020-08-21 16:40:56,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:56,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078955713] [2020-08-21 16:40:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:56,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:56,635 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 16:40:56,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078955713] [2020-08-21 16:40:56,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:56,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:40:56,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708659249] [2020-08-21 16:40:56,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:40:56,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:56,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:40:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:40:56,684 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-08-21 16:40:56,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:56,735 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-08-21 16:40:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:40:56,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-21 16:40:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:56,746 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:40:56,746 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 16:40:56,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:40:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 16:40:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 16:40:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 16:40:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-21 16:40:56,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-08-21 16:40:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:56,789 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-21 16:40:56,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:40:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-21 16:40:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 16:40:56,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:56,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:56,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:40:56,791 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:56,792 INFO L82 PathProgramCache]: Analyzing trace with hash -657165101, now seen corresponding path program 1 times [2020-08-21 16:40:56,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:56,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652298293] [2020-08-21 16:40:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,147 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 16:40:57,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652298293] [2020-08-21 16:40:57,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:40:57,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 16:40:57,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982092091] [2020-08-21 16:40:57,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:40:57,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:40:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:40:57,152 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-08-21 16:40:57,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:40:57,305 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-08-21 16:40:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 16:40:57,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 16:40:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:40:57,308 INFO L225 Difference]: With dead ends: 22 [2020-08-21 16:40:57,308 INFO L226 Difference]: Without dead ends: 17 [2020-08-21 16:40:57,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:40:57,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-21 16:40:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-08-21 16:40:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 16:40:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-08-21 16:40:57,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-08-21 16:40:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:40:57,317 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-08-21 16:40:57,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:40:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-08-21 16:40:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 16:40:57,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:40:57,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:40:57,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:40:57,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:40:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:40:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 523159493, now seen corresponding path program 1 times [2020-08-21 16:40:57,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:40:57,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716622862] [2020-08-21 16:40:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:40:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,719 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2020-08-21 16:40:57,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:40:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:40:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:40:57,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716622862] [2020-08-21 16:40:57,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:40:57,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:40:57,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852725020] [2020-08-21 16:40:57,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 16:40:57,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:40:57,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 16:40:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-08-21 16:40:57,941 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 12 states. [2020-08-21 16:41:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:00,360 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-08-21 16:41:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:41:00,362 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-08-21 16:41:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:00,363 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:41:00,364 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 16:41:00,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:41:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 16:41:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-08-21 16:41:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 16:41:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-21 16:41:00,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2020-08-21 16:41:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:00,375 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-21 16:41:00,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 16:41:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-21 16:41:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 16:41:00,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:00,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:00,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:41:00,378 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:00,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1996800441, now seen corresponding path program 1 times [2020-08-21 16:41:00,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:00,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818230739] [2020-08-21 16:41:00,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:02,204 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2020-08-21 16:41:02,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:41:02,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818230739] [2020-08-21 16:41:02,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:41:02,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 16:41:02,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504531318] [2020-08-21 16:41:02,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 16:41:02,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 16:41:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 16:41:02,252 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-08-21 16:41:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:04,414 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-08-21 16:41:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 16:41:04,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-21 16:41:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:04,415 INFO L225 Difference]: With dead ends: 27 [2020-08-21 16:41:04,415 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 16:41:04,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:41:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 16:41:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 16:41:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 16:41:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 16:41:04,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-08-21 16:41:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:04,423 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 16:41:04,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 16:41:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 16:41:04,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:41:04,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:04,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:04,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:41:04,425 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 675886995, now seen corresponding path program 2 times [2020-08-21 16:41:04,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:04,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139615528] [2020-08-21 16:41:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:04,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:41:04,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139615528] [2020-08-21 16:41:04,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:41:04,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 16:41:04,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395413954] [2020-08-21 16:41:04,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:41:04,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:04,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:41:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:41:04,551 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 16:41:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:04,628 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-08-21 16:41:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:41:04,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 16:41:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:04,629 INFO L225 Difference]: With dead ends: 29 [2020-08-21 16:41:04,629 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:41:04,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:41:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:41:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-08-21 16:41:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-21 16:41:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-21 16:41:04,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-08-21 16:41:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:04,636 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-21 16:41:04,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:41:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-21 16:41:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:41:04,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:41:04,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:41:04,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:41:04,638 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:41:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:41:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1844072939, now seen corresponding path program 1 times [2020-08-21 16:41:04,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:41:04,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443483946] [2020-08-21 16:41:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:41:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:04,854 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2020-08-21 16:41:04,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:41:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:41:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 16:41:04,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443483946] [2020-08-21 16:41:04,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:41:04,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 16:41:04,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34493991] [2020-08-21 16:41:04,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 16:41:04,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:41:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 16:41:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 16:41:04,980 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2020-08-21 16:41:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:41:05,142 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-08-21 16:41:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:41:05,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-08-21 16:41:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:41:05,144 INFO L225 Difference]: With dead ends: 20 [2020-08-21 16:41:05,144 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:41:05,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:41:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:41:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:41:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:41:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:41:05,149 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-08-21 16:41:05,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:41:05,150 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:41:05,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 16:41:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:41:05,150 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:41:05,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:41:05,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:41:05,351 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:41:05,351 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-21 16:41:05,351 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:41:05,351 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:41:05,352 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-21 16:41:05,352 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:41:05,352 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:41:05,352 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:41:05,352 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 31) the Hoare annotation is: true [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 31) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-08-21 16:41:05,353 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 26) no Hoare annotation was computed. [2020-08-21 16:41:05,354 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 28) the Hoare annotation is: (let ((.cse2 (+ main_~i~0 main_~j~0))) (let ((.cse0 (<= main_~l~0 .cse2)) (.cse1 (<= .cse2 main_~l~0))) (or (and .cse0 .cse1 (<= main_~l~0 0) (<= 0 main_~l~0)) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0)) (and .cse0 .cse1 (<= (+ (* 4294967296 (div main_~n~0 4294967296)) main_~l~0 1) (+ main_~i~0 main_~j~0 main_~n~0)))))) [2020-08-21 16:41:05,354 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 28) the Hoare annotation is: (or (let ((.cse2 (div (+ main_~i~0 main_~j~0) 4294967296)) (.cse3 (div main_~l~0 4294967296))) (let ((.cse1 (* 4294967296 .cse3)) (.cse0 (+ (* 4294967296 .cse2) main_~l~0))) (and (< .cse0 (+ main_~i~0 main_~j~0 .cse1 1)) (< .cse2 (+ .cse3 1)) (<= (+ main_~i~0 main_~j~0 .cse1) .cse0)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-21 16:41:05,354 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 16:41:05,354 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 31) no Hoare annotation was computed. [2020-08-21 16:41:05,354 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 16:41:05,355 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 16:41:05,355 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 16:41:05,355 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 16:41:05,355 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 16:41:05,355 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 16:41:05,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:41:05 BoogieIcfgContainer [2020-08-21 16:41:05,375 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:41:05,377 INFO L168 Benchmark]: Toolchain (without parser) took 9687.59 ms. Allocated memory was 137.9 MB in the beginning and 251.1 MB in the end (delta: 113.2 MB). Free memory was 101.2 MB in the beginning and 185.8 MB in the end (delta: -84.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:05,378 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:41:05,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:05,380 INFO L168 Benchmark]: Boogie Preprocessor took 98.16 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 178.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:05,381 INFO L168 Benchmark]: RCFGBuilder took 272.31 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 165.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:05,382 INFO L168 Benchmark]: TraceAbstraction took 9056.35 ms. Allocated memory was 200.3 MB in the beginning and 251.1 MB in the end (delta: 50.9 MB). Free memory was 164.7 MB in the beginning and 185.8 MB in the end (delta: -21.1 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:41:05,393 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 101.0 MB in the beginning and 91.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.16 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 91.3 MB in the beginning and 178.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.31 ms. Allocated memory is still 200.3 MB. Free memory was 178.6 MB in the beginning and 165.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9056.35 ms. Allocated memory was 200.3 MB in the beginning and 251.1 MB in the end (delta: 50.9 MB). Free memory was 164.7 MB in the beginning and 185.8 MB in the end (delta: -21.1 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((l <= i + j && i + j <= l) && l <= 0) && 0 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE)) || ((l <= i + j && i + j <= l) && 4294967296 * (n / 4294967296) + l + 1 <= i + j + n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 102 SDslu, 103 SDs, 0 SdLazy, 200 SolverSat, 43 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 121 HoareAnnotationTreeSize, 12 FomulaSimplifications, 189 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 187 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 11306 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 7/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...