/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 22:30:47,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 22:30:47,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 22:30:47,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 22:30:47,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 22:30:47,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 22:30:47,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 22:30:47,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 22:30:47,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 22:30:47,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 22:30:47,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 22:30:47,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 22:30:47,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 22:30:47,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 22:30:47,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 22:30:47,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 22:30:47,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 22:30:47,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 22:30:47,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 22:30:47,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 22:30:47,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 22:30:47,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 22:30:47,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 22:30:47,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 22:30:47,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 22:30:47,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 22:30:47,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 22:30:47,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 22:30:47,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 22:30:47,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 22:30:47,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 22:30:47,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 22:30:47,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 22:30:47,875 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 22:30:47,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 22:30:47,875 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 22:30:47,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 22:30:47,877 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 22:30:47,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 22:30:47,877 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 22:30:47,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 22:30:47,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 22:30:47,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 22:30:47,881 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 22:30:47,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 22:30:47,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 22:30:47,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 22:30:47,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 22:30:47,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 22:30:47,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 22:30:47,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 22:30:47,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 22:30:47,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 22:30:47,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 22:30:48,169 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 22:30:48,182 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 22:30:48,186 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 22:30:48,187 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 22:30:48,188 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 22:30:48,188 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-17 22:30:48,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bcfbb4d/8d4e67c7a0d94286b71a5ab143cef8da/FLAGdf43d5e76 [2020-07-17 22:30:48,719 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 22:30:48,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-17 22:30:48,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bcfbb4d/8d4e67c7a0d94286b71a5ab143cef8da/FLAGdf43d5e76 [2020-07-17 22:30:49,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35bcfbb4d/8d4e67c7a0d94286b71a5ab143cef8da [2020-07-17 22:30:49,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 22:30:49,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 22:30:49,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 22:30:49,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 22:30:49,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 22:30:49,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2895088e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49, skipping insertion in model container [2020-07-17 22:30:49,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 22:30:49,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 22:30:49,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:30:49,418 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 22:30:49,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:30:49,457 INFO L208 MainTranslator]: Completed translation [2020-07-17 22:30:49,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49 WrapperNode [2020-07-17 22:30:49,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 22:30:49,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 22:30:49,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 22:30:49,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 22:30:49,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... [2020-07-17 22:30:49,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 22:30:49,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 22:30:49,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 22:30:49,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 22:30:49,650 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 22:30:49,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 22:30:49,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 22:30:49,717 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-17 22:30:49,717 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-07-17 22:30:49,718 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 22:30:49,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 22:30:49,938 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 22:30:49,938 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 22:30:49,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:30:49 BoogieIcfgContainer [2020-07-17 22:30:49,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 22:30:49,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 22:30:49,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 22:30:49,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 22:30:49,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 10:30:49" (1/3) ... [2020-07-17 22:30:49,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b05bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:30:49, skipping insertion in model container [2020-07-17 22:30:49,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:30:49" (2/3) ... [2020-07-17 22:30:49,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b05bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:30:49, skipping insertion in model container [2020-07-17 22:30:49,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:30:49" (3/3) ... [2020-07-17 22:30:49,957 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-07-17 22:30:49,972 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 22:30:49,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 22:30:49,997 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 22:30:50,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 22:30:50,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 22:30:50,025 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 22:30:50,025 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 22:30:50,025 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 22:30:50,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 22:30:50,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 22:30:50,026 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 22:30:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-17 22:30:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-17 22:30:50,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:30:50,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:30:50,053 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:30:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:30:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-07-17 22:30:50,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:30:50,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572296287] [2020-07-17 22:30:50,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:30:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:50,335 INFO L280 TraceCheckUtils]: 0: Hoare triple {24#true} assume true; {24#true} is VALID [2020-07-17 22:30:50,335 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {24#true} {24#true} #35#return; {24#true} is VALID [2020-07-17 22:30:50,338 INFO L263 TraceCheckUtils]: 0: Hoare triple {24#true} call ULTIMATE.init(); {24#true} is VALID [2020-07-17 22:30:50,338 INFO L280 TraceCheckUtils]: 1: Hoare triple {24#true} assume true; {24#true} is VALID [2020-07-17 22:30:50,339 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {24#true} {24#true} #35#return; {24#true} is VALID [2020-07-17 22:30:50,339 INFO L263 TraceCheckUtils]: 3: Hoare triple {24#true} call #t~ret1 := main(); {24#true} is VALID [2020-07-17 22:30:50,341 INFO L280 TraceCheckUtils]: 4: Hoare triple {24#true} ~i~0 := 0; {28#(<= main_~i~0 0)} is VALID [2020-07-17 22:30:50,342 INFO L280 TraceCheckUtils]: 5: Hoare triple {28#(<= main_~i~0 0)} assume !!(~i~0 < 5);#t~post0 := ~i~0;~i~0 := 1 + #t~post0;havoc #t~post0; {29#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:50,344 INFO L263 TraceCheckUtils]: 6: Hoare triple {29#(<= main_~i~0 1)} call check_error((if 3 != ~i~0 then 1 else 0)); {30#(not (= 0 |check_error_#in~b|))} is VALID [2020-07-17 22:30:50,345 INFO L280 TraceCheckUtils]: 7: Hoare triple {30#(not (= 0 |check_error_#in~b|))} ~b := #in~b; {31#(not (= 0 check_error_~b))} is VALID [2020-07-17 22:30:50,346 INFO L280 TraceCheckUtils]: 8: Hoare triple {31#(not (= 0 check_error_~b))} assume !(0 != ~b); {25#false} is VALID [2020-07-17 22:30:50,347 INFO L263 TraceCheckUtils]: 9: Hoare triple {25#false} call __blast_assert(); {25#false} is VALID [2020-07-17 22:30:50,347 INFO L280 TraceCheckUtils]: 10: Hoare triple {25#false} assume !false; {25#false} is VALID [2020-07-17 22:30:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:30:50,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572296287] [2020-07-17 22:30:50,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 22:30:50,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 22:30:50,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965980531] [2020-07-17 22:30:50,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-17 22:30:50,362 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:30:50,365 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-17 22:30:50,403 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:30:50,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 22:30:50,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:30:50,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 22:30:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 22:30:50,415 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-07-17 22:30:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:50,709 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-17 22:30:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 22:30:50,710 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-17 22:30:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:30:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-17 22:30:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 54 transitions. [2020-07-17 22:30:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-17 22:30:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 54 transitions. [2020-07-17 22:30:50,729 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 7 states and 54 transitions. [2020-07-17 22:30:50,812 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 54 edges. 54 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:30:50,825 INFO L225 Difference]: With dead ends: 42 [2020-07-17 22:30:50,826 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 22:30:50,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 22:30:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 22:30:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-17 22:30:50,886 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:30:50,887 INFO L82 GeneralOperation]: Start isEquivalent. First operand 21 states. Second operand 20 states. [2020-07-17 22:30:50,888 INFO L74 IsIncluded]: Start isIncluded. First operand 21 states. Second operand 20 states. [2020-07-17 22:30:50,888 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 20 states. [2020-07-17 22:30:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:50,892 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-17 22:30:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-17 22:30:50,894 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:30:50,894 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:30:50,895 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand 21 states. [2020-07-17 22:30:50,895 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 21 states. [2020-07-17 22:30:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:50,900 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-07-17 22:30:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-17 22:30:50,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:30:50,901 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:30:50,902 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:30:50,902 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:30:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-17 22:30:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-17 22:30:50,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-07-17 22:30:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:30:50,908 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-17 22:30:50,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 22:30:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-17 22:30:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 22:30:50,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:30:50,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:30:50,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 22:30:50,911 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:30:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:30:50,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-07-17 22:30:50,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:30:50,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98728196] [2020-07-17 22:30:50,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:30:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:51,068 INFO L280 TraceCheckUtils]: 0: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,068 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {170#true} {170#true} #35#return; {170#true} is VALID [2020-07-17 22:30:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:51,096 INFO L280 TraceCheckUtils]: 0: Hoare triple {170#true} ~b := #in~b; {170#true} is VALID [2020-07-17 22:30:51,097 INFO L280 TraceCheckUtils]: 1: Hoare triple {170#true} assume 0 != ~b; {170#true} is VALID [2020-07-17 22:30:51,097 INFO L280 TraceCheckUtils]: 2: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,098 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {170#true} {175#(<= main_~i~0 1)} #39#return; {175#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:51,099 INFO L263 TraceCheckUtils]: 0: Hoare triple {170#true} call ULTIMATE.init(); {170#true} is VALID [2020-07-17 22:30:51,099 INFO L280 TraceCheckUtils]: 1: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,100 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {170#true} {170#true} #35#return; {170#true} is VALID [2020-07-17 22:30:51,100 INFO L263 TraceCheckUtils]: 3: Hoare triple {170#true} call #t~ret1 := main(); {170#true} is VALID [2020-07-17 22:30:51,101 INFO L280 TraceCheckUtils]: 4: Hoare triple {170#true} ~i~0 := 0; {174#(<= main_~i~0 0)} is VALID [2020-07-17 22:30:51,104 INFO L280 TraceCheckUtils]: 5: Hoare triple {174#(<= main_~i~0 0)} assume !!(~i~0 < 5);#t~post0 := ~i~0;~i~0 := 1 + #t~post0;havoc #t~post0; {175#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:51,104 INFO L263 TraceCheckUtils]: 6: Hoare triple {175#(<= main_~i~0 1)} call check_error((if 3 != ~i~0 then 1 else 0)); {170#true} is VALID [2020-07-17 22:30:51,105 INFO L280 TraceCheckUtils]: 7: Hoare triple {170#true} ~b := #in~b; {170#true} is VALID [2020-07-17 22:30:51,105 INFO L280 TraceCheckUtils]: 8: Hoare triple {170#true} assume 0 != ~b; {170#true} is VALID [2020-07-17 22:30:51,105 INFO L280 TraceCheckUtils]: 9: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,107 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {170#true} {175#(<= main_~i~0 1)} #39#return; {175#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:51,110 INFO L280 TraceCheckUtils]: 11: Hoare triple {175#(<= main_~i~0 1)} assume !!(~i~0 < 5);#t~post0 := ~i~0;~i~0 := 1 + #t~post0;havoc #t~post0; {180#(<= main_~i~0 2)} is VALID [2020-07-17 22:30:51,112 INFO L263 TraceCheckUtils]: 12: Hoare triple {180#(<= main_~i~0 2)} call check_error((if 3 != ~i~0 then 1 else 0)); {181#(not (= 0 |check_error_#in~b|))} is VALID [2020-07-17 22:30:51,123 INFO L280 TraceCheckUtils]: 13: Hoare triple {181#(not (= 0 |check_error_#in~b|))} ~b := #in~b; {182#(not (= 0 check_error_~b))} is VALID [2020-07-17 22:30:51,125 INFO L280 TraceCheckUtils]: 14: Hoare triple {182#(not (= 0 check_error_~b))} assume !(0 != ~b); {171#false} is VALID [2020-07-17 22:30:51,125 INFO L263 TraceCheckUtils]: 15: Hoare triple {171#false} call __blast_assert(); {171#false} is VALID [2020-07-17 22:30:51,125 INFO L280 TraceCheckUtils]: 16: Hoare triple {171#false} assume !false; {171#false} is VALID [2020-07-17 22:30:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:30:51,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98728196] [2020-07-17 22:30:51,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646547348] [2020-07-17 22:30:51,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 22:30:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:51,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-17 22:30:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:30:51,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 22:30:51,282 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 22:30:51,340 INFO L263 TraceCheckUtils]: 0: Hoare triple {170#true} call ULTIMATE.init(); {170#true} is VALID [2020-07-17 22:30:51,340 INFO L280 TraceCheckUtils]: 1: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,340 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {170#true} {170#true} #35#return; {170#true} is VALID [2020-07-17 22:30:51,341 INFO L263 TraceCheckUtils]: 3: Hoare triple {170#true} call #t~ret1 := main(); {170#true} is VALID [2020-07-17 22:30:51,343 INFO L280 TraceCheckUtils]: 4: Hoare triple {170#true} ~i~0 := 0; {174#(<= main_~i~0 0)} is VALID [2020-07-17 22:30:51,344 INFO L280 TraceCheckUtils]: 5: Hoare triple {174#(<= main_~i~0 0)} assume !!(~i~0 < 5);#t~post0 := ~i~0;~i~0 := 1 + #t~post0;havoc #t~post0; {175#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:51,344 INFO L263 TraceCheckUtils]: 6: Hoare triple {175#(<= main_~i~0 1)} call check_error((if 3 != ~i~0 then 1 else 0)); {170#true} is VALID [2020-07-17 22:30:51,344 INFO L280 TraceCheckUtils]: 7: Hoare triple {170#true} ~b := #in~b; {170#true} is VALID [2020-07-17 22:30:51,345 INFO L280 TraceCheckUtils]: 8: Hoare triple {170#true} assume 0 != ~b; {170#true} is VALID [2020-07-17 22:30:51,345 INFO L280 TraceCheckUtils]: 9: Hoare triple {170#true} assume true; {170#true} is VALID [2020-07-17 22:30:51,346 INFO L275 TraceCheckUtils]: 10: Hoare quadruple {170#true} {175#(<= main_~i~0 1)} #39#return; {175#(<= main_~i~0 1)} is VALID [2020-07-17 22:30:51,347 INFO L280 TraceCheckUtils]: 11: Hoare triple {175#(<= main_~i~0 1)} assume !!(~i~0 < 5);#t~post0 := ~i~0;~i~0 := 1 + #t~post0;havoc #t~post0; {180#(<= main_~i~0 2)} is VALID [2020-07-17 22:30:51,349 INFO L263 TraceCheckUtils]: 12: Hoare triple {180#(<= main_~i~0 2)} call check_error((if 3 != ~i~0 then 1 else 0)); {222#(<= 1 |check_error_#in~b|)} is VALID [2020-07-17 22:30:51,350 INFO L280 TraceCheckUtils]: 13: Hoare triple {222#(<= 1 |check_error_#in~b|)} ~b := #in~b; {226#(<= 1 check_error_~b)} is VALID [2020-07-17 22:30:51,355 INFO L280 TraceCheckUtils]: 14: Hoare triple {226#(<= 1 check_error_~b)} assume !(0 != ~b); {171#false} is VALID [2020-07-17 22:30:51,356 INFO L263 TraceCheckUtils]: 15: Hoare triple {171#false} call __blast_assert(); {171#false} is VALID [2020-07-17 22:30:51,356 INFO L280 TraceCheckUtils]: 16: Hoare triple {171#false} assume !false; {171#false} is VALID [2020-07-17 22:30:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 22:30:51,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 22:30:51,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-17 22:30:51,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523581486] [2020-07-17 22:30:51,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-17 22:30:51,365 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:30:51,366 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states. [2020-07-17 22:30:51,392 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:30:51,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 22:30:51,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:30:51,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 22:30:51,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-17 22:30:51,393 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-07-17 22:30:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:51,580 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-17 22:30:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 22:30:51,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-17 22:30:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:30:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-07-17 22:30:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 27 transitions. [2020-07-17 22:30:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-07-17 22:30:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 27 transitions. [2020-07-17 22:30:51,589 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states and 27 transitions. [2020-07-17 22:30:51,631 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:30:51,633 INFO L225 Difference]: With dead ends: 30 [2020-07-17 22:30:51,633 INFO L226 Difference]: Without dead ends: 27 [2020-07-17 22:30:51,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 22:30:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-17 22:30:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-07-17 22:30:51,661 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:30:51,661 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand 26 states. [2020-07-17 22:30:51,661 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand 26 states. [2020-07-17 22:30:51,662 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 26 states. [2020-07-17 22:30:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:51,665 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-17 22:30:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-17 22:30:51,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:30:51,667 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:30:51,667 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand 27 states. [2020-07-17 22:30:51,667 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 27 states. [2020-07-17 22:30:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:30:51,672 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-17 22:30:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-17 22:30:51,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:30:51,673 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:30:51,674 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:30:51,674 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:30:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-17 22:30:51,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-07-17 22:30:51,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-07-17 22:30:51,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:30:51,678 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-07-17 22:30:51,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 22:30:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-07-17 22:30:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-17 22:30:51,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:30:51,680 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:30:51,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-17 22:30:51,882 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:30:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:30:51,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-07-17 22:30:51,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:30:51,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23229003] [2020-07-17 22:30:51,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:30:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:30:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:30:51,931 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 22:30:51,931 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 22:30:51,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 22:30:51,956 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-17 22:30:51,956 WARN L170 areAnnotationChecker]: check_errorENTRY has no Hoare annotation [2020-07-17 22:30:51,956 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:30:51,956 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: __blast_assertENTRY has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: __blast_assertENTRY has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: L18 has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: L18 has no Hoare annotation [2020-07-17 22:30:51,957 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: __blast_assertFINAL has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: L29-1 has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: L29-1 has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: L29-1 has no Hoare annotation [2020-07-17 22:30:51,958 WARN L170 areAnnotationChecker]: L18-3 has no Hoare annotation [2020-07-17 22:30:51,959 WARN L170 areAnnotationChecker]: L18-2 has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: L18-2 has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: __blast_assertEXIT has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: L24-2 has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: L29 has no Hoare annotation [2020-07-17 22:30:51,963 WARN L170 areAnnotationChecker]: check_errorEXIT has no Hoare annotation [2020-07-17 22:30:51,970 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-17 22:30:51,970 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-17 22:30:51,971 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-17 22:30:51,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 10:30:51 BoogieIcfgContainer [2020-07-17 22:30:51,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 22:30:51,980 INFO L168 Benchmark]: Toolchain (without parser) took 2809.49 ms. Allocated memory was 137.4 MB in the beginning and 235.4 MB in the end (delta: 98.0 MB). Free memory was 101.9 MB in the beginning and 139.7 MB in the end (delta: -37.8 MB). Peak memory consumption was 60.2 MB. Max. memory is 7.1 GB. [2020-07-17 22:30:51,982 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 22:30:51,983 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.74 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 22:30:51,985 INFO L168 Benchmark]: Boogie Preprocessor took 189.63 ms. Allocated memory was 137.4 MB in the beginning and 205.5 MB in the end (delta: 68.2 MB). Free memory was 92.2 MB in the beginning and 184.8 MB in the end (delta: -92.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-17 22:30:51,987 INFO L168 Benchmark]: RCFGBuilder took 296.09 ms. Allocated memory is still 205.5 MB. Free memory was 184.8 MB in the beginning and 169.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-17 22:30:51,989 INFO L168 Benchmark]: TraceAbstraction took 2028.59 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 169.5 MB in the beginning and 139.7 MB in the end (delta: 29.8 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. [2020-07-17 22:30:52,003 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.74 ms. Allocated memory is still 137.4 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 189.63 ms. Allocated memory was 137.4 MB in the beginning and 205.5 MB in the end (delta: 68.2 MB). Free memory was 92.2 MB in the beginning and 184.8 MB in the end (delta: -92.6 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.09 ms. Allocated memory is still 205.5 MB. Free memory was 184.8 MB in the beginning and 169.5 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2028.59 ms. Allocated memory was 205.5 MB in the beginning and 235.4 MB in the end (delta: 29.9 MB). Free memory was 169.5 MB in the beginning and 139.7 MB in the end (delta: 29.8 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 15 SDslu, 98 SDs, 0 SdLazy, 50 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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 incorrect! Received shutdown request...