/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/s2iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:45:23,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:45:23,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:45:23,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:45:23,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:45:23,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:45:23,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:45:23,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:45:23,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:45:23,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:45:23,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:45:23,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:45:23,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:45:23,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:45:23,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:45:23,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:45:23,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:45:23,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:45:23,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:45:23,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:45:23,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:45:23,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:45:23,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:45:23,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:45:23,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:45:23,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:45:23,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:45:23,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:45:23,110 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 [2020-07-19 21:45:23,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:45:23,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:45:23,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:45:23,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:45:23,127 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:45:23,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:45:23,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:45:23,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:45:23,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:45:23,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:45:23,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:45:23,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:45:23,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:45:23,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:45:23,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:45:23,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:45:23,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:45:23,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:45:23,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:45:23,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:45:23,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:45:23,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:45:23,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:45:23,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:45:23,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:45:23,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:45:23,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:45:23,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:45:23,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:45:23,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:45:23,417 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:45:23,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:45:23,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:45:23,436 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:45:23,436 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:45:23,437 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-19 21:45:23,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5f02/850734f5b8cc49daa7a1cd19bcd28703/FLAG9f2475417 [2020-07-19 21:45:23,943 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:45:23,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-19 21:45:23,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5f02/850734f5b8cc49daa7a1cd19bcd28703/FLAG9f2475417 [2020-07-19 21:45:24,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5f02/850734f5b8cc49daa7a1cd19bcd28703 [2020-07-19 21:45:24,318 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:45:24,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:45:24,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:24,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:45:24,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:45:24,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2663ae14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24, skipping insertion in model container [2020-07-19 21:45:24,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:45:24,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:45:24,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:24,583 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:45:24,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:45:24,625 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:45:24,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24 WrapperNode [2020-07-19 21:45:24,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:45:24,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:45:24,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:45:24,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:45:24,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (1/1) ... [2020-07-19 21:45:24,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:45:24,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:45:24,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:45:24,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:45:24,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (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 [2020-07-19 21:45:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:45:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:45:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:45:24,851 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:45:24,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:45:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:45:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:45:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:45:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:45:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:45:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:45:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:45:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:45:24,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:45:25,158 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:45:25,159 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 21:45:25,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:25 BoogieIcfgContainer [2020-07-19 21:45:25,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:45:25,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:45:25,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:45:25,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:45:25,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:45:24" (1/3) ... [2020-07-19 21:45:25,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd55389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:25, skipping insertion in model container [2020-07-19 21:45:25,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:45:24" (2/3) ... [2020-07-19 21:45:25,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd55389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:45:25, skipping insertion in model container [2020-07-19 21:45:25,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:45:25" (3/3) ... [2020-07-19 21:45:25,171 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-19 21:45:25,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:45:25,189 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:45:25,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:45:25,238 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:45:25,238 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:45:25,239 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:45:25,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:45:25,239 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:45:25,239 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:45:25,239 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:45:25,239 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:45:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-19 21:45:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:45:25,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:25,264 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] [2020-07-19 21:45:25,264 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:25,269 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-19 21:45:25,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:25,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828395038] [2020-07-19 21:45:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:25,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828395038] [2020-07-19 21:45:25,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:25,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:45:25,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057060171] [2020-07-19 21:45:25,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:45:25,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:45:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:45:25,588 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-19 21:45:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:25,680 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-19 21:45:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:45:25,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-19 21:45:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:25,691 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:45:25,691 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 21:45:25,695 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 [2020-07-19 21:45:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 21:45:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-19 21:45:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 21:45:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-19 21:45:25,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-19 21:45:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:25,735 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-19 21:45:25,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:45:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-19 21:45:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:45:25,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:25,737 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] [2020-07-19 21:45:25,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:45:25,738 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-19 21:45:25,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:25,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621129576] [2020-07-19 21:45:25,740 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:25,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621129576] [2020-07-19 21:45:25,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:45:25,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:45:25,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669346108] [2020-07-19 21:45:25,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:45:25,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:25,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:45:25,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:45:25,883 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-19 21:45:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:26,006 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-19 21:45:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:45:26,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-19 21:45:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:26,008 INFO L225 Difference]: With dead ends: 40 [2020-07-19 21:45:26,008 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:45:26,009 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 [2020-07-19 21:45:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:45:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-19 21:45:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:45:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-19 21:45:26,018 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-19 21:45:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:26,018 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-19 21:45:26,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:45:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-19 21:45:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:45:26,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:26,019 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] [2020-07-19 21:45:26,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:45:26,020 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-19 21:45:26,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:26,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586360492] [2020-07-19 21:45:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:26,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586360492] [2020-07-19 21:45:26,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526741922] [2020-07-19 21:45:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 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 [2020-07-19 21:45:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:26,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:45:26,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:26,554 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 [2020-07-19 21:45:26,555 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:45:26,567 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:45:26,568 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 21:45:26,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-19 21:45:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 21:45:26,620 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 [2020-07-19 21:45:26,622 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:45:26,634 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:45:26,634 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 21:45:26,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-19 21:45:26,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 21:45:26,874 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:45:26,875 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 [2020-07-19 21:45:26,877 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:45:26,916 INFO L624 ElimStorePlain]: treesize reduction 30, result has 63.4 percent of original size [2020-07-19 21:45:26,922 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. [2020-07-19 21:45:26,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:52 [2020-07-19 21:45:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-19 21:45:27,013 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-19 21:45:27,014 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 43 treesize of output 31 [2020-07-19 21:45:27,015 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-19 21:45:27,037 INFO L624 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2020-07-19 21:45:27,039 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-19 21:45:27,039 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:59, output treesize:10 [2020-07-19 21:45:27,068 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-19 21:45:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:27,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:27,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-19 21:45:27,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214859613] [2020-07-19 21:45:27,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:45:27,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:27,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:45:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:45:27,122 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-19 21:45:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:27,863 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-19 21:45:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:45:27,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-19 21:45:27,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:27,866 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:45:27,867 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:45:27,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2020-07-19 21:45:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:45:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-19 21:45:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:45:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-19 21:45:27,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-19 21:45:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:27,876 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-19 21:45:27,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:45:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-19 21:45:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:45:27,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:27,878 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] [2020-07-19 21:45:28,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:45:28,093 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:28,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:28,094 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-19 21:45:28,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:28,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361893700] [2020-07-19 21:45:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:28,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361893700] [2020-07-19 21:45:28,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781625345] [2020-07-19 21:45:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 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 [2020-07-19 21:45:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:45:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:28,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:28,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 21:45:28,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039809848] [2020-07-19 21:45:28,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:45:28,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:28,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:45:28,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:45:28,289 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-19 21:45:28,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:28,518 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-19 21:45:28,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:45:28,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-19 21:45:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:28,520 INFO L225 Difference]: With dead ends: 45 [2020-07-19 21:45:28,520 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:45:28,521 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 [2020-07-19 21:45:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:45:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-19 21:45:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:45:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-19 21:45:28,531 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-19 21:45:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:28,532 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-19 21:45:28,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:45:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-19 21:45:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:45:28,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:28,533 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] [2020-07-19 21:45:28,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:28,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:28,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-19 21:45:28,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:28,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148082431] [2020-07-19 21:45:28,751 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:28,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148082431] [2020-07-19 21:45:28,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430390681] [2020-07-19 21:45:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 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 [2020-07-19 21:45:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:45:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:45:28,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:45:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:45:28,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:45:28,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-19 21:45:28,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983812393] [2020-07-19 21:45:28,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:45:28,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:45:28,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:45:28,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:45:28,934 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-19 21:45:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:45:29,126 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-19 21:45:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:45:29,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-19 21:45:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:45:29,130 INFO L225 Difference]: With dead ends: 49 [2020-07-19 21:45:29,130 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:45:29,132 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 [2020-07-19 21:45:29,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:45:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-19 21:45:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-19 21:45:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-19 21:45:29,141 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-19 21:45:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:45:29,142 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-19 21:45:29,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:45:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-19 21:45:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:45:29,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:45:29,143 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] [2020-07-19 21:45:29,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:45:29,359 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:45:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:45:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-19 21:45:29,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:45:29,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138833945] [2020-07-19 21:45:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@765ebee8 [2020-07-19 21:45:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:45:29,404 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:45:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:45:29,437 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:45:29,459 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:45:29,459 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:45:29,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-19 21:45:29,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:45:29 BoogieIcfgContainer [2020-07-19 21:45:29,499 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:45:29,501 INFO L168 Benchmark]: Toolchain (without parser) took 5180.86 ms. Allocated memory was 141.0 MB in the beginning and 257.9 MB in the end (delta: 116.9 MB). Free memory was 99.0 MB in the beginning and 224.6 MB in the end (delta: -125.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:45:29,502 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 21:45:29,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.08 ms. Allocated memory is still 141.0 MB. Free memory was 98.5 MB in the beginning and 87.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:29,503 INFO L168 Benchmark]: Boogie Preprocessor took 138.41 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.8 MB in the beginning and 175.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:29,504 INFO L168 Benchmark]: RCFGBuilder took 397.72 ms. Allocated memory is still 198.7 MB. Free memory was 175.9 MB in the beginning and 159.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:45:29,505 INFO L168 Benchmark]: TraceAbstraction took 4334.91 ms. Allocated memory was 198.7 MB in the beginning and 257.9 MB in the end (delta: 59.2 MB). Free memory was 158.3 MB in the beginning and 224.6 MB in the end (delta: -66.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-19 21:45:29,509 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 117.3 MB in the beginning and 117.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.08 ms. Allocated memory is still 141.0 MB. Free memory was 98.5 MB in the beginning and 87.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.41 ms. Allocated memory was 141.0 MB in the beginning and 198.7 MB in the end (delta: 57.7 MB). Free memory was 87.8 MB in the beginning and 175.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.72 ms. Allocated memory is still 198.7 MB. Free memory was 175.9 MB in the beginning and 159.1 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4334.91 ms. Allocated memory was 198.7 MB in the beginning and 257.9 MB in the end (delta: 59.2 MB). Free memory was 158.3 MB in the beginning and 224.6 MB in the end (delta: -66.3 MB). There was no memory consumed. 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={7:0}] [L30] COND TRUE i