/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/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 22:50:41,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 22:50:41,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 22:50:41,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 22:50:41,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 22:50:41,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 22:50:41,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 22:50:41,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 22:50:41,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 22:50:41,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 22:50:41,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 22:50:41,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 22:50:41,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 22:50:41,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 22:50:41,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 22:50:41,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 22:50:41,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 22:50:41,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 22:50:41,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 22:50:41,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 22:50:41,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 22:50:41,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 22:50:41,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 22:50:41,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 22:50:41,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 22:50:41,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 22:50:41,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 22:50:41,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 22:50:41,731 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 22:50:41,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 22:50:41,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 22:50:41,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 22:50:41,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 22:50:41,747 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 22:50:41,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 22:50:41,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 22:50:41,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 22:50:41,749 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 22:50:41,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 22:50:41,749 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 22:50:41,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 22:50:41,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 22:50:41,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 22:50:41,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 22:50:41,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 22:50:41,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 22:50:41,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 22:50:41,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 22:50:41,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 22:50:41,751 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 22:50:41,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 22:50:41,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 22:50:41,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 22:50:41,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 22:50:42,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 22:50:42,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 22:50:42,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 22:50:42,041 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 22:50:42,042 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 22:50:42,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-07-17 22:50:42,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6eddc912/d0c3009534eb4ab6bb18cc4ae284fc55/FLAG128dc664b [2020-07-17 22:50:42,622 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 22:50:42,622 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2020-07-17 22:50:42,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6eddc912/d0c3009534eb4ab6bb18cc4ae284fc55/FLAG128dc664b [2020-07-17 22:50:43,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6eddc912/d0c3009534eb4ab6bb18cc4ae284fc55 [2020-07-17 22:50:43,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 22:50:43,062 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 22:50:43,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 22:50:43,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 22:50:43,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 22:50:43,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f89a8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43, skipping insertion in model container [2020-07-17 22:50:43,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 22:50:43,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 22:50:43,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:50:43,277 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 22:50:43,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 22:50:43,308 INFO L208 MainTranslator]: Completed translation [2020-07-17 22:50:43,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43 WrapperNode [2020-07-17 22:50:43,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 22:50:43,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 22:50:43,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 22:50:43,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 22:50:43,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (1/1) ... [2020-07-17 22:50:43,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 22:50:43,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 22:50:43,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 22:50:43,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 22:50:43,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (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 22:50:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 22:50:43,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 22:50:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 22:50:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-17 22:50:43,501 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 22:50:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 22:50:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 22:50:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 22:50:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 22:50:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-17 22:50:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 22:50:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 22:50:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 22:50:43,763 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 22:50:43,764 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 22:50:43,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:50:43 BoogieIcfgContainer [2020-07-17 22:50:43,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 22:50:43,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 22:50:43,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 22:50:43,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 22:50:43,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 10:50:43" (1/3) ... [2020-07-17 22:50:43,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef51ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:50:43, skipping insertion in model container [2020-07-17 22:50:43,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 10:50:43" (2/3) ... [2020-07-17 22:50:43,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ef51ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 10:50:43, skipping insertion in model container [2020-07-17 22:50:43,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 10:50:43" (3/3) ... [2020-07-17 22:50:43,778 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-07-17 22:50:43,791 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 22:50:43,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 22:50:43,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 22:50:43,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 22:50:43,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 22:50:43,841 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 22:50:43,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 22:50:43,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 22:50:43,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 22:50:43,842 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 22:50:43,842 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 22:50:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-17 22:50:43,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-17 22:50:43,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:50:43,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:50:43,871 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:50:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:50:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1873481772, now seen corresponding path program 1 times [2020-07-17 22:50:43,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:50:43,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983123273] [2020-07-17 22:50:43,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:50:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:50:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 22:50:44,056 INFO L280 TraceCheckUtils]: 0: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-17 22:50:44,056 INFO L280 TraceCheckUtils]: 1: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-17 22:50:44,057 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {27#true} {27#true} #42#return; {27#true} is VALID [2020-07-17 22:50:44,064 INFO L263 TraceCheckUtils]: 0: Hoare triple {27#true} call ULTIMATE.init(); {32#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-17 22:50:44,064 INFO L280 TraceCheckUtils]: 1: Hoare triple {32#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {27#true} is VALID [2020-07-17 22:50:44,064 INFO L280 TraceCheckUtils]: 2: Hoare triple {27#true} assume true; {27#true} is VALID [2020-07-17 22:50:44,065 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {27#true} {27#true} #42#return; {27#true} is VALID [2020-07-17 22:50:44,065 INFO L263 TraceCheckUtils]: 4: Hoare triple {27#true} call #t~ret3 := main(); {27#true} is VALID [2020-07-17 22:50:44,065 INFO L280 TraceCheckUtils]: 5: Hoare triple {27#true} assume -2147483648 <= #t~nondet1 && #t~nondet1 <= 2147483647;~x~0 := #t~nondet1;havoc #t~nondet1; {27#true} is VALID [2020-07-17 22:50:44,067 INFO L280 TraceCheckUtils]: 6: Hoare triple {27#true} assume !true; {28#false} is VALID [2020-07-17 22:50:44,067 INFO L263 TraceCheckUtils]: 7: Hoare triple {28#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {28#false} is VALID [2020-07-17 22:50:44,068 INFO L280 TraceCheckUtils]: 8: Hoare triple {28#false} ~cond := #in~cond; {28#false} is VALID [2020-07-17 22:50:44,068 INFO L280 TraceCheckUtils]: 9: Hoare triple {28#false} assume 0 == ~cond; {28#false} is VALID [2020-07-17 22:50:44,068 INFO L280 TraceCheckUtils]: 10: Hoare triple {28#false} assume !false; {28#false} is VALID [2020-07-17 22:50:44,070 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 22:50:44,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983123273] [2020-07-17 22:50:44,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 22:50:44,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 22:50:44,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634147747] [2020-07-17 22:50:44,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-17 22:50:44,082 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-17 22:50:44,086 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-17 22:50:44,112 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 22:50:44,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 22:50:44,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 22:50:44,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 22:50:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 22:50:44,126 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-07-17 22:50:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:44,260 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-17 22:50:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 22:50:44,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-17 22:50:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 22:50:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-17 22:50:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2020-07-17 22:50:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-17 22:50:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2020-07-17 22:50:44,277 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 40 transitions. [2020-07-17 22:50:44,352 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-17 22:50:44,364 INFO L225 Difference]: With dead ends: 35 [2020-07-17 22:50:44,364 INFO L226 Difference]: Without dead ends: 18 [2020-07-17 22:50:44,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 22:50:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-17 22:50:44,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-17 22:50:44,421 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-17 22:50:44,422 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand 18 states. [2020-07-17 22:50:44,422 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-17 22:50:44,422 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-17 22:50:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:44,427 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-07-17 22:50:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-17 22:50:44,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:50:44,428 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:50:44,429 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand 18 states. [2020-07-17 22:50:44,429 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 18 states. [2020-07-17 22:50:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 22:50:44,433 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2020-07-17 22:50:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-17 22:50:44,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 22:50:44,434 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-17 22:50:44,434 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-17 22:50:44,434 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-17 22:50:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-17 22:50:44,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-07-17 22:50:44,439 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-07-17 22:50:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 22:50:44,439 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-07-17 22:50:44,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 22:50:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-07-17 22:50:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-17 22:50:44,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 22:50:44,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 22:50:44,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 22:50:44,442 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 22:50:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 22:50:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1862399520, now seen corresponding path program 1 times [2020-07-17 22:50:44,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 22:50:44,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552242392] [2020-07-17 22:50:44,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 22:50:44,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:50:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 22:50:44,500 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 22:50:44,500 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 22:50:44,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 22:50:44,523 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-17 22:50:44,523 WARN L170 areAnnotationChecker]: fooENTRY has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-17 22:50:44,524 WARN L170 areAnnotationChecker]: fooFINAL has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:50:44,525 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: fooEXIT has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: fooEXIT has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-17 22:50:44,526 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-17 22:50:44,527 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-17 22:50:44,528 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-17 22:50:44,528 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-17 22:50:44,528 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-17 22:50:44,528 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-17 22:50:44,528 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 22:50:44,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 10:50:44 BoogieIcfgContainer [2020-07-17 22:50:44,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 22:50:44,535 INFO L168 Benchmark]: Toolchain (without parser) took 1473.34 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 104.6 MB in the beginning and 112.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:44,536 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 22:50:44,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.08 ms. Allocated memory is still 146.3 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:44,538 INFO L168 Benchmark]: Boogie Preprocessor took 118.81 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 94.6 MB in the beginning and 181.6 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:44,539 INFO L168 Benchmark]: RCFGBuilder took 339.40 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:44,540 INFO L168 Benchmark]: TraceAbstraction took 761.97 ms. Allocated memory is still 202.9 MB. Free memory was 164.2 MB in the beginning and 113.5 MB in the end (delta: 50.7 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. [2020-07-17 22:50:44,543 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 0.48 ms. Allocated memory is still 146.3 MB. Free memory is still 122.4 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.08 ms. Allocated memory is still 146.3 MB. Free memory was 104.2 MB in the beginning and 94.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.81 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 94.6 MB in the beginning and 181.6 MB in the end (delta: -86.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 339.40 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 164.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 761.97 ms. Allocated memory is still 202.9 MB. Free memory was 164.2 MB in the beginning and 113.5 MB in the end (delta: 50.7 MB). Peak memory consumption was 50.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; VAL [\old(x)=2, x=0] [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) VAL [\old(x)=0, x=-1] [L26] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=-1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 5 SDslu, 10 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 120 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...