/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:32:21,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:32:21,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:32:21,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:32:21,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:32:21,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:32:21,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:32:21,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:32:21,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:32:21,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:32:21,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:32:21,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:32:21,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:32:21,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:32:21,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:32:21,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:32:21,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:32:21,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:32:21,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:32:21,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:32:21,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:32:21,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:32:21,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:32:21,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:32:21,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:32:21,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:32:21,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:32:21,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:32:21,622 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 [2020-07-07 11:32:21,650 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:32:21,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:32:21,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:32:21,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:32:21,653 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:32:21,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:32:21,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:32:21,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:32:21,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:32:21,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:32:21,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:32:21,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:32:21,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:32:21,656 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:32:21,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:32:21,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:32:21,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:32:21,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:32:21,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:32:21,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:32:21,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:32:21,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:32:21,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:32:21,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:32:21,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:32:21,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:32:21,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:32:21,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:32:21,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:32:21,660 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:32:21,965 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:32:21,980 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:32:21,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:32:21,986 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:32:21,986 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:32:21,987 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-07 11:32:22,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2d9fd5d/4a3782868e0f4216954e2bff7b3cd77c/FLAG99dd56186 [2020-07-07 11:32:22,603 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:32:22,604 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-07 11:32:22,610 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2d9fd5d/4a3782868e0f4216954e2bff7b3cd77c/FLAG99dd56186 [2020-07-07 11:32:23,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2d9fd5d/4a3782868e0f4216954e2bff7b3cd77c [2020-07-07 11:32:23,029 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:32:23,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:32:23,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:23,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:32:23,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:32:23,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@381793df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23, skipping insertion in model container [2020-07-07 11:32:23,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:32:23,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:32:23,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:23,275 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:32:23,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:32:23,314 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:32:23,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23 WrapperNode [2020-07-07 11:32:23,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:32:23,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:32:23,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:32:23,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:32:23,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (1/1) ... [2020-07-07 11:32:23,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:32:23,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:32:23,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:32:23,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:32:23,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (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 [2020-07-07 11:32:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:32:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:32:23,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:32:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:32:23,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:32:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:32:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:32:23,534 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:32:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:32:23,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:32:23,536 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:32:23,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:32:23,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 11:32:23,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:32:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:32:23,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:32:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:32:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:32:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:32:23,923 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:32:23,924 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:32:23,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:23 BoogieIcfgContainer [2020-07-07 11:32:23,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:32:23,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:32:23,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:32:23,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:32:23,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:32:23" (1/3) ... [2020-07-07 11:32:23,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f3a7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:23, skipping insertion in model container [2020-07-07 11:32:23,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:32:23" (2/3) ... [2020-07-07 11:32:23,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34f3a7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:32:23, skipping insertion in model container [2020-07-07 11:32:23,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:32:23" (3/3) ... [2020-07-07 11:32:23,939 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-07-07 11:32:23,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:32:23,960 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:32:23,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:32:24,017 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:32:24,017 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:32:24,017 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:32:24,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:32:24,018 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:32:24,018 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:32:24,018 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:32:24,018 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:32:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-07 11:32:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:32:24,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:24,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:24,054 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:24,063 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-07 11:32:24,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:24,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746455399] [2020-07-07 11:32:24,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:24,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746455399] [2020-07-07 11:32:24,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:24,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:32:24,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546275747] [2020-07-07 11:32:24,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:32:24,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:24,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:32:24,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:24,336 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-07 11:32:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:24,477 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-07 11:32:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:32:24,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-07 11:32:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:24,491 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:32:24,492 INFO L226 Difference]: Without dead ends: 25 [2020-07-07 11:32:24,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:32:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-07 11:32:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-07 11:32:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:32:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-07 11:32:24,557 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-07 11:32:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:24,557 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-07 11:32:24,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:32:24,558 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-07 11:32:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-07 11:32:24,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:24,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:24,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:32:24,561 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-07 11:32:24,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:24,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117682300] [2020-07-07 11:32:24,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:24,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117682300] [2020-07-07 11:32:24,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:32:24,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:32:24,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929754541] [2020-07-07 11:32:24,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:32:24,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:32:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:32:24,722 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-07 11:32:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:24,950 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-07 11:32:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:32:24,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-07 11:32:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:24,953 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:32:24,953 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:32:24,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:32:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:32:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-07 11:32:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:32:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-07 11:32:24,974 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-07 11:32:24,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:24,975 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-07 11:32:24,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:32:24,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-07 11:32:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:32:24,980 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:24,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:24,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:32:24,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:24,983 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-07 11:32:24,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:24,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650492439] [2020-07-07 11:32:24,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650492439] [2020-07-07 11:32:25,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885522044] [2020-07-07 11:32:25,485 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 [2020-07-07 11:32:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:25,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:32:25,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:25,635 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:32:25,635 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:25,646 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:25,647 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:25,647 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-07 11:32:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:25,693 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-07 11:32:25,694 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:25,707 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:25,708 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:25,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-07 11:32:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:25,949 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:25,950 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-07 11:32:25,952 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:25,992 INFO L624 ElimStorePlain]: treesize reduction 24, result has 65.7 percent of original size [2020-07-07 11:32:25,999 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-07-07 11:32:26,000 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-07-07 11:32:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-07 11:32:26,097 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:26,098 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-07-07 11:32:26,100 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:32:26,115 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:32:26,116 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:32:26,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:53, output treesize:10 [2020-07-07 11:32:26,156 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-07 11:32:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:26,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:26,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-07-07 11:32:26,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218718052] [2020-07-07 11:32:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:32:26,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:26,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:32:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:32:26,224 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 22 states. [2020-07-07 11:32:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:27,124 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-07 11:32:27,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:32:27,124 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-07 11:32:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:27,129 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:32:27,130 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:32:27,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:32:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:32:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-07 11:32:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:32:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-07 11:32:27,146 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-07 11:32:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:27,147 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-07 11:32:27,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:32:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-07 11:32:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-07 11:32:27,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:27,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:27,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:32:27,364 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:27,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:27,365 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-07 11:32:27,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:27,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155502781] [2020-07-07 11:32:27,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:27,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155502781] [2020-07-07 11:32:27,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240495723] [2020-07-07 11:32:27,471 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:27,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:32:27,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:27,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:27,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:27,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:27,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:27,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238243054] [2020-07-07 11:32:27,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:27,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:27,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:27,570 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-07 11:32:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:27,788 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-07 11:32:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:32:27,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-07 11:32:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:27,791 INFO L225 Difference]: With dead ends: 45 [2020-07-07 11:32:27,791 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:32:27,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:32:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:32:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-07 11:32:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-07 11:32:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-07 11:32:27,799 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-07 11:32:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:27,800 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-07 11:32:27,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-07 11:32:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 11:32:27,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:27,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:28,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:28,017 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-07 11:32:28,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:28,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457727127] [2020-07-07 11:32:28,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:32:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:28,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457727127] [2020-07-07 11:32:28,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566866718] [2020-07-07 11:32:28,129 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:28,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-07-07 11:32:28,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:32:28,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:32:28,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:32:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:32:28,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:32:28,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-07 11:32:28,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214875591] [2020-07-07 11:32:28,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:32:28,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:32:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:32:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:32:28,269 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-07 11:32:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:32:28,451 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-07 11:32:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:32:28,451 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-07 11:32:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:32:28,452 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:32:28,453 INFO L226 Difference]: Without dead ends: 35 [2020-07-07 11:32:28,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:32:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-07 11:32:28,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-07 11:32:28,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:32:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-07 11:32:28,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-07 11:32:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:32:28,464 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-07 11:32:28,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:32:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-07 11:32:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:32:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:32:28,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:32:28,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:32:28,680 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:32:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:32:28,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-07 11:32:28,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:32:28,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681538822] [2020-07-07 11:32:28,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:32:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:32:28,760 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:32:28,760 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:32:28,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:32:28,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:32:28 BoogieIcfgContainer [2020-07-07 11:32:28,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:32:28,822 INFO L168 Benchmark]: Toolchain (without parser) took 5790.95 ms. Allocated memory was 137.9 MB in the beginning and 248.0 MB in the end (delta: 110.1 MB). Free memory was 102.6 MB in the beginning and 179.6 MB in the end (delta: -77.0 MB). Peak memory consumption was 33.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,823 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,824 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,825 INFO L168 Benchmark]: Boogie Preprocessor took 135.90 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,825 INFO L168 Benchmark]: RCFGBuilder took 477.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,826 INFO L168 Benchmark]: TraceAbstraction took 4889.19 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 162.4 MB in the beginning and 179.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:32:28,830 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.90 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 477.47 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 162.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4889.19 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 162.4 MB in the beginning and 179.6 MB in the end (delta: -17.1 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i