/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/trex02-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-11 02:28:20,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-11 02:28:20,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-11 02:28:20,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-11 02:28:20,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-11 02:28:20,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-11 02:28:20,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-11 02:28:20,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-11 02:28:20,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-11 02:28:20,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-11 02:28:20,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-11 02:28:20,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-11 02:28:20,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-11 02:28:20,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-11 02:28:20,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-11 02:28:20,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-11 02:28:20,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-11 02:28:20,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-11 02:28:20,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-11 02:28:20,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-11 02:28:20,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-11 02:28:20,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-11 02:28:20,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-11 02:28:20,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-11 02:28:20,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-11 02:28:20,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-11 02:28:20,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-11 02:28:20,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-11 02:28:20,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-11 02:28:20,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-11 02:28:20,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-11 02:28:20,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-11 02:28:20,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-11 02:28:20,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-11 02:28:20,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-11 02:28:20,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-11 02:28:20,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-11 02:28:20,523 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-11 02:28:20,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-11 02:28:20,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-11 02:28:20,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-11 02:28:20,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-11 02:28:20,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-11 02:28:20,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-11 02:28:20,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-11 02:28:20,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-11 02:28:20,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-11 02:28:20,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-11 02:28:20,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-11 02:28:20,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-11 02:28:20,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-11 02:28:20,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-11 02:28:20,533 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-11 02:28:20,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-11 02:28:20,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-11 02:28:20,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-11 02:28:20,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-11 02:28:20,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-11 02:28:20,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-11 02:28:20,535 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-07-11 02:28:20,846 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-11 02:28:20,863 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-11 02:28:20,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-11 02:28:20,868 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-11 02:28:20,869 INFO L275 PluginConnector]: CDTParser initialized [2020-07-11 02:28:20,869 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex02-2.c [2020-07-11 02:28:20,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b06d899/bbf5f5eed4c0411387e919d02b2684e0/FLAG755d5b83c [2020-07-11 02:28:21,411 INFO L306 CDTParser]: Found 1 translation units. [2020-07-11 02:28:21,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex02-2.c [2020-07-11 02:28:21,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b06d899/bbf5f5eed4c0411387e919d02b2684e0/FLAG755d5b83c [2020-07-11 02:28:21,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7b06d899/bbf5f5eed4c0411387e919d02b2684e0 [2020-07-11 02:28:21,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-11 02:28:21,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-11 02:28:21,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-11 02:28:21,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-11 02:28:21,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-11 02:28:21,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 02:28:21" (1/1) ... [2020-07-11 02:28:21,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@172b527d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:21, skipping insertion in model container [2020-07-11 02:28:21,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 02:28:21" (1/1) ... [2020-07-11 02:28:21,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-11 02:28:21,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-11 02:28:21,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-11 02:28:21,993 INFO L203 MainTranslator]: Completed pre-run [2020-07-11 02:28:22,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-11 02:28:22,021 INFO L208 MainTranslator]: Completed translation [2020-07-11 02:28:22,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22 WrapperNode [2020-07-11 02:28:22,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-11 02:28:22,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-11 02:28:22,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-11 02:28:22,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-11 02:28:22,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (1/1) ... [2020-07-11 02:28:22,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-11 02:28:22,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-11 02:28:22,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-11 02:28:22,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-11 02:28:22,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (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 [2020-07-11 02:28:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-11 02:28:22,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-11 02:28:22,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-11 02:28:22,208 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-07-11 02:28:22,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-11 02:28:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-11 02:28:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-11 02:28:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-11 02:28:22,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-11 02:28:22,209 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-07-11 02:28:22,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-11 02:28:22,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-11 02:28:22,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-11 02:28:22,453 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-11 02:28:22,453 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-11 02:28:22,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 02:28:22 BoogieIcfgContainer [2020-07-11 02:28:22,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-11 02:28:22,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-11 02:28:22,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-11 02:28:22,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-11 02:28:22,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 02:28:21" (1/3) ... [2020-07-11 02:28:22,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d0ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 02:28:22, skipping insertion in model container [2020-07-11 02:28:22,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 02:28:22" (2/3) ... [2020-07-11 02:28:22,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26d0ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 02:28:22, skipping insertion in model container [2020-07-11 02:28:22,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 02:28:22" (3/3) ... [2020-07-11 02:28:22,469 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-07-11 02:28:22,487 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-11 02:28:22,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-11 02:28:22,545 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-11 02:28:22,575 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-11 02:28:22,575 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-11 02:28:22,575 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-11 02:28:22,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-11 02:28:22,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-11 02:28:22,576 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-11 02:28:22,576 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-11 02:28:22,576 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-11 02:28:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-11 02:28:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-11 02:28:22,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-11 02:28:22,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-11 02:28:22,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-11 02:28:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-11 02:28:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1010422485, now seen corresponding path program 1 times [2020-07-11 02:28:22,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-11 02:28:22,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855871876] [2020-07-11 02:28:22,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-11 02:28:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-11 02:28:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-11 02:28:22,784 INFO L280 TraceCheckUtils]: 0: Hoare triple {38#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {33#true} is VALID [2020-07-11 02:28:22,785 INFO L280 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-11 02:28:22,785 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #48#return; {33#true} is VALID [2020-07-11 02:28:22,791 INFO L263 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {38#(= ~x~0 |old(~x~0)|)} is VALID [2020-07-11 02:28:22,791 INFO L280 TraceCheckUtils]: 1: Hoare triple {38#(= ~x~0 |old(~x~0)|)} ~x~0 := 0; {33#true} is VALID [2020-07-11 02:28:22,792 INFO L280 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2020-07-11 02:28:22,792 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #48#return; {33#true} is VALID [2020-07-11 02:28:22,793 INFO L263 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret3 := main(); {33#true} is VALID [2020-07-11 02:28:22,793 INFO L280 TraceCheckUtils]: 5: Hoare triple {33#true} assume -2147483648 <= #t~nondet1 && #t~nondet1 <= 2147483647; {33#true} is VALID [2020-07-11 02:28:22,793 INFO L280 TraceCheckUtils]: 6: Hoare triple {33#true} ~x~0 := #t~nondet1; {33#true} is VALID [2020-07-11 02:28:22,794 INFO L280 TraceCheckUtils]: 7: Hoare triple {33#true} havoc #t~nondet1; {33#true} is VALID [2020-07-11 02:28:22,797 INFO L280 TraceCheckUtils]: 8: Hoare triple {33#true} assume !true; {34#false} is VALID [2020-07-11 02:28:22,797 INFO L263 TraceCheckUtils]: 9: Hoare triple {34#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {34#false} is VALID [2020-07-11 02:28:22,798 INFO L280 TraceCheckUtils]: 10: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2020-07-11 02:28:22,798 INFO L280 TraceCheckUtils]: 11: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2020-07-11 02:28:22,798 INFO L280 TraceCheckUtils]: 12: Hoare triple {34#false} assume !false; {34#false} is VALID [2020-07-11 02:28:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-11 02:28:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855871876] [2020-07-11 02:28:22,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-11 02:28:22,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-11 02:28:22,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105739948] [2020-07-11 02:28:22,815 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-11 02:28:22,821 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-11 02:28:22,825 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-11 02:28:22,874 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 13 edges. 13 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 02:28:22,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-11 02:28:22,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-11 02:28:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-11 02:28:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-11 02:28:22,889 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-07-11 02:28:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 02:28:23,065 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-07-11 02:28:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-11 02:28:23,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-11 02:28:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-11 02:28:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-11 02:28:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2020-07-11 02:28:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-11 02:28:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2020-07-11 02:28:23,083 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 46 transitions. [2020-07-11 02:28:23,165 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 46 edges. 46 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 02:28:23,178 INFO L225 Difference]: With dead ends: 41 [2020-07-11 02:28:23,178 INFO L226 Difference]: Without dead ends: 24 [2020-07-11 02:28:23,182 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 [2020-07-11 02:28:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-11 02:28:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-11 02:28:23,242 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-11 02:28:23,243 INFO L82 GeneralOperation]: Start isEquivalent. First operand 24 states. Second operand 24 states. [2020-07-11 02:28:23,244 INFO L74 IsIncluded]: Start isIncluded. First operand 24 states. Second operand 24 states. [2020-07-11 02:28:23,244 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 24 states. [2020-07-11 02:28:23,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 02:28:23,249 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-11 02:28:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-11 02:28:23,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-11 02:28:23,250 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-11 02:28:23,250 INFO L74 IsIncluded]: Start isIncluded. First operand 24 states. Second operand 24 states. [2020-07-11 02:28:23,250 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 24 states. [2020-07-11 02:28:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 02:28:23,255 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-07-11 02:28:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-11 02:28:23,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-11 02:28:23,256 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-11 02:28:23,256 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-11 02:28:23,256 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-11 02:28:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-11 02:28:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-11 02:28:23,261 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-07-11 02:28:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-11 02:28:23,262 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-11 02:28:23,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-11 02:28:23,262 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 24 states and 26 transitions. [2020-07-11 02:28:23,301 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 02:28:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-11 02:28:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-11 02:28:23,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-11 02:28:23,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-11 02:28:23,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-11 02:28:23,303 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-11 02:28:23,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-11 02:28:23,304 INFO L82 PathProgramCache]: Analyzing trace with hash 997493191, now seen corresponding path program 1 times [2020-07-11 02:28:23,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-11 02:28:23,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474678374] [2020-07-11 02:28:23,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-11 02:28:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-11 02:28:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-11 02:28:23,360 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-11 02:28:23,361 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-11 02:28:23,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-11 02:28:23,382 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-11 02:28:23,382 WARN L170 areAnnotationChecker]: fooENTRY has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-11 02:28:23,383 WARN L170 areAnnotationChecker]: L16 has no Hoare annotation [2020-07-11 02:28:23,384 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-11 02:28:23,384 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-11 02:28:23,384 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-11 02:28:23,384 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-11 02:28:23,384 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-11 02:28:23,385 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-11 02:28:23,385 WARN L170 areAnnotationChecker]: L16-1 has no Hoare annotation [2020-07-11 02:28:23,385 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-11 02:28:23,385 WARN L170 areAnnotationChecker]: L20-1 has no Hoare annotation [2020-07-11 02:28:23,385 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-11 02:28:23,386 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-11 02:28:23,386 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-11 02:28:23,386 WARN L170 areAnnotationChecker]: fooFINAL has no Hoare annotation [2020-07-11 02:28:23,386 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-11 02:28:23,386 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: fooEXIT has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: fooEXIT has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-11 02:28:23,387 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: L22 has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: L22-1 has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-11 02:28:23,388 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-11 02:28:23,389 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-11 02:28:23,389 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-11 02:28:23,389 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-11 02:28:23,389 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-11 02:28:23,389 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. [2020-07-11 02:28:23,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 02:28:23 BoogieIcfgContainer [2020-07-11 02:28:23,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-11 02:28:23,396 INFO L168 Benchmark]: Toolchain (without parser) took 1600.31 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 103.1 MB in the beginning and 101.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 60.1 MB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,397 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.00 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,399 INFO L168 Benchmark]: Boogie Preprocessor took 120.17 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.4 MB in the beginning and 182.7 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,400 INFO L168 Benchmark]: RCFGBuilder took 316.98 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 166.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,401 INFO L168 Benchmark]: TraceAbstraction took 932.23 ms. Allocated memory is still 203.9 MB. Free memory was 165.8 MB in the beginning and 101.3 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.5 MB. Max. memory is 7.1 GB. [2020-07-11 02:28:23,405 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 0.30 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.00 ms. Allocated memory is still 145.8 MB. Free memory was 102.9 MB in the beginning and 93.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.17 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.4 MB in the beginning and 182.7 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 316.98 ms. Allocated memory is still 203.9 MB. Free memory was 182.7 MB in the beginning and 166.4 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 932.23 ms. Allocated memory is still 203.9 MB. Free memory was 165.8 MB in the beginning and 101.3 MB in the end (delta: 64.5 MB). Peak memory consumption was 64.5 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() VAL [\old(x)=0, __VERIFIER_nondet_int()=-1, x=-1] [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, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 7 SDslu, 14 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=30occurred 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, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 168 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...