/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:50:22,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:50:22,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:50:22,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:50:22,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:50:22,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:50:22,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:50:22,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:50:22,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:50:22,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:50:22,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:50:22,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:50:22,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:50:22,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:50:22,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:50:22,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:50:22,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:50:22,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:50:22,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:50:22,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:50:22,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:50:22,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:50:22,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:50:22,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:50:22,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:50:22,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:50:22,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:50:22,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:50:22,765 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 [2020-08-18 18:50:22,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:50:22,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:50:22,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:50:22,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:50:22,813 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:50:22,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:50:22,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:50:22,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:50:22,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:50:22,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:50:22,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:50:22,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:50:22,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:50:22,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:50:22,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:50:22,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:50:22,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:50:22,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:50:22,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:50:22,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:50:22,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:50:22,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:50:22,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:50:22,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:50:22,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:50:22,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:50:22,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:50:22,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:50:22,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:50:22,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:50:23,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:50:23,114 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:50:23,117 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:50:23,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:50:23,119 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:50:23,120 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 18:50:23,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d25afc970/6315ef08d8ca486996fa876c009c5799/FLAG619e62312 [2020-08-18 18:50:23,633 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:50:23,634 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 18:50:23,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d25afc970/6315ef08d8ca486996fa876c009c5799/FLAG619e62312 [2020-08-18 18:50:24,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d25afc970/6315ef08d8ca486996fa876c009c5799 [2020-08-18 18:50:24,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:50:24,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:50:24,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:24,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:50:24,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:50:24,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ce2d4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24, skipping insertion in model container [2020-08-18 18:50:24,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:50:24,066 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:50:24,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:24,258 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:50:24,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:24,288 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:50:24,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24 WrapperNode [2020-08-18 18:50:24,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:24,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:50:24,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:50:24,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:50:24,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,303 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,383 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (1/1) ... [2020-08-18 18:50:24,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:50:24,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:50:24,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:50:24,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:50:24,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (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 [2020-08-18 18:50:24,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:50:24,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:50:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:50:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:50:24,458 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:50:24,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:50:24,459 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:50:24,459 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:50:24,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:50:24,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:50:24,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:50:24,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:50:24,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:50:24,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:50:24,685 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:50:24,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:24 BoogieIcfgContainer [2020-08-18 18:50:24,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:50:24,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:50:24,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:50:24,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:50:24,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:50:24" (1/3) ... [2020-08-18 18:50:24,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a15937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:24, skipping insertion in model container [2020-08-18 18:50:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:24" (2/3) ... [2020-08-18 18:50:24,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a15937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:24, skipping insertion in model container [2020-08-18 18:50:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:24" (3/3) ... [2020-08-18 18:50:24,698 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-18 18:50:24,708 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:50:24,716 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:50:24,730 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:50:24,754 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:50:24,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:50:24,755 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:50:24,755 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:50:24,755 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:50:24,755 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:50:24,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:50:24,755 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:50:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 18:50:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:50:24,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:24,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:24,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:24,783 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-18 18:50:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:24,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183491119] [2020-08-18 18:50:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:25,338 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2020-08-18 18:50:25,484 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-08-18 18:50:25,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:25,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183491119] [2020-08-18 18:50:25,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:25,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:50:25,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568802211] [2020-08-18 18:50:25,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:50:25,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:25,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:50:25,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:25,602 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-18 18:50:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:28,029 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-18 18:50:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:50:28,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-18 18:50:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:28,042 INFO L225 Difference]: With dead ends: 49 [2020-08-18 18:50:28,043 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 18:50:28,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:50:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 18:50:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-18 18:50:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:50:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-18 18:50:28,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-18 18:50:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:28,093 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-18 18:50:28,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:50:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-18 18:50:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 18:50:28,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:28,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:28,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:50:28,096 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-18 18:50:28,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:28,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165957895] [2020-08-18 18:50:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:28,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:28,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165957895] [2020-08-18 18:50:28,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:28,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:50:28,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650383812] [2020-08-18 18:50:28,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:50:28,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:28,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:50:28,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:50:28,775 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 13 states. [2020-08-18 18:50:31,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:31,254 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-08-18 18:50:31,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:50:31,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-18 18:50:31,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:31,256 INFO L225 Difference]: With dead ends: 36 [2020-08-18 18:50:31,256 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 18:50:31,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:50:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 18:50:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-08-18 18:50:31,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:50:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-18 18:50:31,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-08-18 18:50:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:31,272 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-18 18:50:31,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:50:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-18 18:50:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:50:31,275 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:31,275 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:31,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:50:31,277 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-08-18 18:50:31,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:31,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154727516] [2020-08-18 18:50:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:31,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:31,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154727516] [2020-08-18 18:50:31,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:31,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:50:31,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815401894] [2020-08-18 18:50:31,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:50:31,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:31,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:50:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:50:31,422 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-08-18 18:50:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:31,566 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-08-18 18:50:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:50:31,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 18:50:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:31,569 INFO L225 Difference]: With dead ends: 35 [2020-08-18 18:50:31,569 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 18:50:31,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 18:50:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-18 18:50:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 18:50:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-18 18:50:31,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-08-18 18:50:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:31,580 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-18 18:50:31,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:50:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-18 18:50:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:50:31,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:31,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:31,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:50:31,583 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-08-18 18:50:31,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:31,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484661673] [2020-08-18 18:50:31,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:31,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:31,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484661673] [2020-08-18 18:50:31,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:31,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:50:31,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280017253] [2020-08-18 18:50:31,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:50:31,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:50:31,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:50:31,804 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-18 18:50:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:34,041 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-18 18:50:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:50:34,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 18:50:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:34,042 INFO L225 Difference]: With dead ends: 34 [2020-08-18 18:50:34,043 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 18:50:34,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 18:50:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 18:50:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 18:50:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 18:50:34,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-08-18 18:50:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:34,050 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 18:50:34,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:50:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 18:50:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:50:34,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:34,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:34,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:50:34,052 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:34,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:34,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-08-18 18:50:34,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:34,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946548332] [2020-08-18 18:50:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:34,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:34,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946548332] [2020-08-18 18:50:34,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:34,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:50:34,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442592831] [2020-08-18 18:50:34,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:50:34,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:50:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:50:34,199 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-08-18 18:50:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:34,290 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-18 18:50:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:50:34,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 18:50:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:34,291 INFO L225 Difference]: With dead ends: 35 [2020-08-18 18:50:34,291 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 18:50:34,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 18:50:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 18:50:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 18:50:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-18 18:50:34,298 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-08-18 18:50:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:34,299 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-18 18:50:34,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:50:34,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-18 18:50:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:50:34,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:34,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:34,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:50:34,300 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:34,301 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-18 18:50:34,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:34,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473923392] [2020-08-18 18:50:34,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:35,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:35,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473923392] [2020-08-18 18:50:35,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:35,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:50:35,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937094648] [2020-08-18 18:50:35,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:50:35,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:50:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:50:35,084 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 15 states. [2020-08-18 18:50:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:37,800 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-18 18:50:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:50:37,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-08-18 18:50:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:37,802 INFO L225 Difference]: With dead ends: 33 [2020-08-18 18:50:37,802 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 18:50:37,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-08-18 18:50:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 18:50:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 18:50:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:50:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 18:50:37,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-08-18 18:50:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:37,809 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 18:50:37,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:50:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 18:50:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:50:37,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:37,810 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:37,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:50:37,811 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 2 times [2020-08-18 18:50:37,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:37,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292942704] [2020-08-18 18:50:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:37,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:37,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292942704] [2020-08-18 18:50:37,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:37,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:50:37,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935955147] [2020-08-18 18:50:37,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:50:37,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:50:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:50:37,933 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-08-18 18:50:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:38,056 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 18:50:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:50:38,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 18:50:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:38,058 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:50:38,058 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 18:50:38,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:50:38,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 18:50:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-18 18:50:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 18:50:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 18:50:38,064 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-08-18 18:50:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:38,064 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 18:50:38,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:50:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 18:50:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 18:50:38,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:38,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:38,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:50:38,066 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:38,066 INFO L82 PathProgramCache]: Analyzing trace with hash 937388738, now seen corresponding path program 1 times [2020-08-18 18:50:38,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:38,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402930468] [2020-08-18 18:50:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:42,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:42,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402930468] [2020-08-18 18:50:42,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:42,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:50:42,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775343405] [2020-08-18 18:50:42,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:50:42,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:50:42,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-18 18:50:42,349 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-18 18:50:44,502 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 26 [2020-08-18 18:50:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:48,789 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-08-18 18:50:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:50:48,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-18 18:50:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:48,793 INFO L225 Difference]: With dead ends: 39 [2020-08-18 18:50:48,793 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 18:50:48,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2020-08-18 18:50:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 18:50:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 18:50:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 18:50:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 18:50:48,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-08-18 18:50:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:48,801 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 18:50:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:50:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 18:50:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:50:48,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:48,802 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:48,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:50:48,803 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:48,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:48,803 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-18 18:50:48,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:48,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146517902] [2020-08-18 18:50:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 18:50:48,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146517902] [2020-08-18 18:50:48,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:48,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:50:48,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742977805] [2020-08-18 18:50:48,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:50:48,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:48,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:50:48,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:48,930 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-18 18:50:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:49,025 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-18 18:50:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:50:49,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 18:50:49,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:49,036 INFO L225 Difference]: With dead ends: 28 [2020-08-18 18:50:49,036 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:50:49,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:50:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:50:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:50:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:50:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:50:49,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 18:50:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:49,038 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:50:49,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:50:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:50:49,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:50:49,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:50:49,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:50:49,156 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:50:49,156 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:50:49,157 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-18 18:50:49,157 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 18:50:49,157 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-08-18 18:50:49,158 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 18:50:49,159 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse1 (div main_~l~0 4294967296)) (.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (let ((.cse3 (+ (* 4294967296 .cse0) main_~l~0)) (.cse2 (* 4294967296 .cse1))) (and (< .cse0 (+ .cse1 1)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2) .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2 1))))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 18:50:49,159 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-08-18 18:50:49,159 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-18 18:50:49,159 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-18 18:50:49,159 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 18:50:49,159 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:50:49,160 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 18:50:49,160 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 18:50:49,160 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:50:49,160 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 18:50:49,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:50:49 BoogieIcfgContainer [2020-08-18 18:50:49,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:50:49,178 INFO L168 Benchmark]: Toolchain (without parser) took 25144.78 ms. Allocated memory was 139.5 MB in the beginning and 265.8 MB in the end (delta: 126.4 MB). Free memory was 101.2 MB in the beginning and 220.3 MB in the end (delta: -119.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,179 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.38 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,180 INFO L168 Benchmark]: Boogie Preprocessor took 110.72 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 180.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,181 INFO L168 Benchmark]: RCFGBuilder took 289.24 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,182 INFO L168 Benchmark]: TraceAbstraction took 24485.17 ms. Allocated memory was 201.9 MB in the beginning and 265.8 MB in the end (delta: 64.0 MB). Free memory was 165.4 MB in the beginning and 220.3 MB in the end (delta: -55.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:49,186 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.3 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 255.38 ms. Allocated memory is still 139.5 MB. Free memory was 100.8 MB in the beginning and 91.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.72 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.0 MB in the beginning and 180.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.24 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 166.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24485.17 ms. Allocated memory was 201.9 MB in the beginning and 265.8 MB in the end (delta: 64.0 MB). Free memory was 165.4 MB in the beginning and 220.3 MB in the end (delta: -55.0 MB). Peak memory consumption was 9.0 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: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.2s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 272 SDslu, 221 SDs, 0 SdLazy, 583 SolverSat, 81 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, 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, 9 MinimizatonAttempts, 17 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 24 NumberOfFragments, 105 HoareAnnotationTreeSize, 17 FomulaSimplifications, 488 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 92 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 35421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 33/60 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...