/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.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_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 [2020-07-20 03:57:05,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:57:05,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:57:05,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:57:05,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:57:05,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:57:05,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:57:05,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:57:05,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:57:05,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:57:05,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:57:05,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:57:05,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:57:05,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:57:05,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:57:05,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:57:05,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:57:05,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:57:05,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:57:05,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:57:05,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:57:05,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:57:05,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:57:05,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:57:05,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:57:05,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:57:05,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:57:05,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:57:05,322 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 [2020-07-20 03:57:05,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:57:05,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:57:05,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:57:05,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:57:05,359 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:57:05,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:57:05,359 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:57:05,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:57:05,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:57:05,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:57:05,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:57:05,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:57:05,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:57:05,363 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:57:05,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:57:05,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:57:05,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:57:05,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:57:05,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:57:05,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:57:05,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:57:05,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:57:05,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:57:05,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:57:05,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:57:05,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:57:05,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:57:05,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:57:05,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:57:05,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 03:57:05,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:57:05,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:57:05,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:57:05,804 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:57:05,805 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:57:05,805 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 03:57:05,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a482f3a4/7f189266d6aa464b9980419448129822/FLAGfe62959cc [2020-07-20 03:57:06,426 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:57:06,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s2iff.c [2020-07-20 03:57:06,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a482f3a4/7f189266d6aa464b9980419448129822/FLAGfe62959cc [2020-07-20 03:57:06,761 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a482f3a4/7f189266d6aa464b9980419448129822 [2020-07-20 03:57:06,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:57:06,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:57:06,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:57:06,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:57:06,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:57:06,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:57:06" (1/1) ... [2020-07-20 03:57:06,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d827fc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:06, skipping insertion in model container [2020-07-20 03:57:06,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:57:06" (1/1) ... [2020-07-20 03:57:06,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:57:06,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:57:07,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:57:07,055 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:57:07,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:57:07,094 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:57:07,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07 WrapperNode [2020-07-20 03:57:07,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:57:07,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:57:07,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:57:07,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:57:07,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (1/1) ... [2020-07-20 03:57:07,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:57:07,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:57:07,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:57:07,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:57:07,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (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 [2020-07-20 03:57:07,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:57:07,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:57:07,300 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 03:57:07,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 03:57:07,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:57:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 03:57:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 03:57:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:57:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:57:07,662 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:57:07,662 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 03:57:07,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:57:07 BoogieIcfgContainer [2020-07-20 03:57:07,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:57:07,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:57:07,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:57:07,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:57:07,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:57:06" (1/3) ... [2020-07-20 03:57:07,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f54821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:57:07, skipping insertion in model container [2020-07-20 03:57:07,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:57:07" (2/3) ... [2020-07-20 03:57:07,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12f54821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:57:07, skipping insertion in model container [2020-07-20 03:57:07,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:57:07" (3/3) ... [2020-07-20 03:57:07,677 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-07-20 03:57:07,686 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:57:07,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:57:07,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:57:07,733 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:57:07,734 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:57:07,734 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:57:07,734 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:57:07,735 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:57:07,735 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:57:07,735 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:57:07,735 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:57:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 03:57:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 03:57:07,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:07,765 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] [2020-07-20 03:57:07,765 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 03:57:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:07,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295700118] [2020-07-20 03:57:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:08,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295700118] [2020-07-20 03:57:08,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:57:08,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 03:57:08,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623020003] [2020-07-20 03:57:08,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 03:57:08,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 03:57:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 03:57:08,117 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 03:57:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:08,240 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 03:57:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 03:57:08,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 03:57:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:08,253 INFO L225 Difference]: With dead ends: 54 [2020-07-20 03:57:08,253 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 03:57:08,258 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 [2020-07-20 03:57:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 03:57:08,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 03:57:08,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 03:57:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 03:57:08,302 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 03:57:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:08,303 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 03:57:08,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 03:57:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 03:57:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 03:57:08,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:08,304 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] [2020-07-20 03:57:08,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:57:08,305 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 03:57:08,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:08,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866379703] [2020-07-20 03:57:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:08,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866379703] [2020-07-20 03:57:08,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:57:08,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:57:08,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201872985] [2020-07-20 03:57:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:57:08,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:57:08,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:57:08,478 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-20 03:57:08,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:08,612 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 03:57:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:57:08,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 03:57:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:08,615 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:57:08,615 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:57:08,616 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 [2020-07-20 03:57:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:57:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 03:57:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:57:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 03:57:08,625 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 03:57:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:08,626 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 03:57:08,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:57:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 03:57:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 03:57:08,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:08,628 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] [2020-07-20 03:57:08,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 03:57:08,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 03:57:08,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:08,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338858385] [2020-07-20 03:57:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338858385] [2020-07-20 03:57:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299682411] [2020-07-20 03:57:09,207 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@183300ab 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 [2020-07-20 03:57:09,322 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@183300ab issued 4 check-sat command(s) [2020-07-20 03:57:09,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:09,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:57:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:09,427 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 [2020-07-20 03:57:09,428 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:09,439 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:09,440 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:09,441 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 03:57:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:09,494 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 [2020-07-20 03:57:09,496 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:09,511 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:09,514 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 03:57:09,514 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2020-07-20 03:57:09,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:09,719 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:09,720 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 [2020-07-20 03:57:09,722 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:09,764 INFO L624 ElimStorePlain]: treesize reduction 22, result has 69.4 percent of original size [2020-07-20 03:57:09,770 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 03:57:09,771 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:50 [2020-07-20 03:57:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 03:57:10,130 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:10,131 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 36 treesize of output 28 [2020-07-20 03:57:10,133 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 03:57:10,169 INFO L624 ElimStorePlain]: treesize reduction 13, result has 65.8 percent of original size [2020-07-20 03:57:10,172 INFO L544 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:10,173 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:55, output treesize:12 [2020-07-20 03:57:10,215 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:10,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:10,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-07-20 03:57:10,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322467973] [2020-07-20 03:57:10,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:57:10,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:10,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:57:10,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:57:10,305 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 22 states. [2020-07-20 03:57:11,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:11,982 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-07-20 03:57:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:57:11,983 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-20 03:57:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:11,986 INFO L225 Difference]: With dead ends: 53 [2020-07-20 03:57:11,987 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 03:57:11,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:57:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 03:57:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-07-20 03:57:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 03:57:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 03:57:11,998 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-20 03:57:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:11,999 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 03:57:11,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:57:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 03:57:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 03:57:12,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:12,000 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] [2020-07-20 03:57:12,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 03:57:12,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -278067577, now seen corresponding path program 1 times [2020-07-20 03:57:12,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:12,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649362255] [2020-07-20 03:57:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:12,236 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:57:12,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629094615] [2020-07-20 03:57:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2881682c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:12,288 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2881682c issued 3 check-sat command(s) [2020-07-20 03:57:12,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:12,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:57:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:12,328 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 15 treesize of output 11 [2020-07-20 03:57:12,328 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:12,336 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:12,337 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:12,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-07-20 03:57:12,378 INFO L350 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-07-20 03:57:12,379 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2020-07-20 03:57:12,380 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:12,390 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:12,390 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:12,391 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 03:57:12,562 INFO L350 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2020-07-20 03:57:12,563 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2020-07-20 03:57:12,564 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:12,587 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:12,590 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:57:12,591 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:57:12,593 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 03:57:12,594 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:48 [2020-07-20 03:57:12,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:57:12,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 03:57:12,632 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 03:57:12,634 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 03:57:12,638 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:12,640 INFO L501 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-07-20 03:57:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649362255] [2020-07-20 03:57:12,711 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:57:12,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629094615] [2020-07-20 03:57:12,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:57:12,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 03:57:12,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801513861] [2020-07-20 03:57:12,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:57:12,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:57:12,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:57:12,714 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 12 states. [2020-07-20 03:57:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:13,302 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-07-20 03:57:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:57:13,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-07-20 03:57:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:13,306 INFO L225 Difference]: With dead ends: 53 [2020-07-20 03:57:13,306 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 03:57:13,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:57:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 03:57:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 03:57:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 03:57:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 03:57:13,330 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 28 [2020-07-20 03:57:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:13,333 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 03:57:13,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:57:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 03:57:13,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 03:57:13,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:13,335 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] [2020-07-20 03:57:13,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:13,552 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 2 times [2020-07-20 03:57:13,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:13,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884491556] [2020-07-20 03:57:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:57:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:13,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884491556] [2020-07-20 03:57:13,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743662943] [2020-07-20 03:57:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e2b9e67 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 [2020-07-20 03:57:13,747 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e2b9e67 issued 4 check-sat command(s) [2020-07-20 03:57:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:57:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 03:57:13,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:57:13,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 03:57:13,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536118723] [2020-07-20 03:57:13,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:57:13,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:57:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:57:13,807 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 11 states. [2020-07-20 03:57:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:14,040 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-20 03:57:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:57:14,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 03:57:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:14,043 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:57:14,043 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 03:57:14,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:57:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 03:57:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2020-07-20 03:57:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 03:57:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-07-20 03:57:14,053 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2020-07-20 03:57:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:14,054 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-07-20 03:57:14,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:57:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-07-20 03:57:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 03:57:14,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:14,055 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:57:14,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:14,271 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1980014395, now seen corresponding path program 2 times [2020-07-20 03:57:14,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:14,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024684288] [2020-07-20 03:57:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:14,285 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 03:57:14,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992417818] [2020-07-20 03:57:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bb512ca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:14,348 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5bb512ca issued 3 check-sat command(s) [2020-07-20 03:57:14,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:57:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:57:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:57:14,360 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 15 treesize of output 11 [2020-07-20 03:57:14,361 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 03:57:14,367 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:14,368 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 03:57:14,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 03:57:14,427 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:14,428 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2020-07-20 03:57:14,429 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 03:57:14,449 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 03:57:14,451 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:14,453 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-20 03:57:14,454 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:28 [2020-07-20 03:57:14,455 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:14,482 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 03:57:14,507 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 03:57:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 03:57:14,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024684288] [2020-07-20 03:57:14,549 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 03:57:14,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992417818] [2020-07-20 03:57:14,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 03:57:14,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 03:57:14,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458573668] [2020-07-20 03:57:14,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:57:14,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:57:14,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:57:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:57:14,552 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-07-20 03:57:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:57:14,819 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-07-20 03:57:14,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:57:14,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-07-20 03:57:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:57:14,822 INFO L225 Difference]: With dead ends: 47 [2020-07-20 03:57:14,822 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 03:57:14,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:57:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 03:57:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-07-20 03:57:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 03:57:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 03:57:14,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2020-07-20 03:57:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:57:14,832 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 03:57:14,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:57:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 03:57:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:57:14,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:57:14,833 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] [2020-07-20 03:57:15,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:57:15,050 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:57:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:57:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 3 times [2020-07-20 03:57:15,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:57:15,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640925211] [2020-07-20 03:57:15,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1df4a700 [2020-07-20 03:57:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:57:15,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:57:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:57:15,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:57:15,131 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:57:15,131 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:57:15,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 03:57:15,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:57:15 BoogieIcfgContainer [2020-07-20 03:57:15,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:57:15,189 INFO L168 Benchmark]: Toolchain (without parser) took 8411.49 ms. Allocated memory was 137.4 MB in the beginning and 287.3 MB in the end (delta: 149.9 MB). Free memory was 101.8 MB in the beginning and 226.1 MB in the end (delta: -124.3 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,190 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.56 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,192 INFO L168 Benchmark]: Boogie Preprocessor took 137.66 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 176.0 MB in the end (delta: -85.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,193 INFO L168 Benchmark]: RCFGBuilder took 433.69 ms. Allocated memory is still 198.7 MB. Free memory was 176.0 MB in the beginning and 158.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,195 INFO L168 Benchmark]: TraceAbstraction took 7517.75 ms. Allocated memory was 198.7 MB in the beginning and 287.3 MB in the end (delta: 88.6 MB). Free memory was 158.6 MB in the beginning and 226.1 MB in the end (delta: -67.5 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:57:15,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.56 ms. Allocated memory is still 137.4 MB. Free memory was 101.4 MB in the beginning and 90.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.66 ms. Allocated memory was 137.4 MB in the beginning and 198.7 MB in the end (delta: 61.3 MB). Free memory was 90.9 MB in the beginning and 176.0 MB in the end (delta: -85.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.69 ms. Allocated memory is still 198.7 MB. Free memory was 176.0 MB in the beginning and 158.6 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7517.75 ms. Allocated memory was 198.7 MB in the beginning and 287.3 MB in the end (delta: 88.6 MB). Free memory was 158.6 MB in the beginning and 226.1 MB in the end (delta: -67.5 MB). Peak memory consumption was 21.1 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={7:0}] [L30] COND TRUE i