/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 NUM_VARIABLES --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/s1iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:47:20,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:47:20,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:47:20,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:47:20,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:47:20,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:47:20,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:47:20,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:47:20,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:47:20,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:47:20,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:47:20,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:47:20,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:47:20,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:47:20,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:47:20,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:47:20,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:47:20,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:47:20,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:47:20,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:47:20,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:47:20,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:47:20,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:47:20,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:47:20,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:47:20,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:47:20,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:47:20,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:47:20,424 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 01:47:20,442 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:47:20,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:47:20,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:47:20,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:47:20,444 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:47:20,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:47:20,444 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:47:20,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:47:20,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:47:20,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:47:20,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:47:20,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:47:20,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:47:20,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:47:20,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:47:20,446 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:47:20,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:47:20,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:47:20,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:47:20,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:47:20,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:47:20,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:47:20,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:47:20,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:47:20,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:47:20,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:47:20,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:47:20,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:47:20,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:47:20,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 01:47:20,736 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:47:20,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:47:20,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:47:20,754 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:47:20,755 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:47:20,755 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 01:47:20,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ecab21d/c1933ebdf08f4f0891f64a21f79bce2a/FLAG8fe552368 [2020-07-20 01:47:21,314 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:47:21,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 01:47:21,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ecab21d/c1933ebdf08f4f0891f64a21f79bce2a/FLAG8fe552368 [2020-07-20 01:47:21,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25ecab21d/c1933ebdf08f4f0891f64a21f79bce2a [2020-07-20 01:47:21,692 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:47:21,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:47:21,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:21,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:47:21,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:47:21,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:21,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d911e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21, skipping insertion in model container [2020-07-20 01:47:21,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:21,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:47:21,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:47:21,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:21,923 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:47:21,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:21,965 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:47:21,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21 WrapperNode [2020-07-20 01:47:21,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:21,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:47:21,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:47:21,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:47:21,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:21,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (1/1) ... [2020-07-20 01:47:22,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:47:22,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:47:22,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:47:22,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:47:22,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (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 01:47:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:47:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:47:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:47:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:47:22,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:47:22,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:47:22,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:47:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:47:22,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:47:22,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:47:22,495 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 01:47:22,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:22 BoogieIcfgContainer [2020-07-20 01:47:22,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:47:22,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:47:22,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:47:22,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:47:22,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:47:21" (1/3) ... [2020-07-20 01:47:22,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fff7f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:22, skipping insertion in model container [2020-07-20 01:47:22,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:21" (2/3) ... [2020-07-20 01:47:22,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fff7f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:22, skipping insertion in model container [2020-07-20 01:47:22,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:22" (3/3) ... [2020-07-20 01:47:22,508 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-20 01:47:22,519 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:47:22,525 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:47:22,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:47:22,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:47:22,562 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:47:22,562 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:47:22,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:47:22,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:47:22,562 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:47:22,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:47:22,562 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:47:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 01:47:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:47:22,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:22,586 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 01:47:22,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:22,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:22,592 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 01:47:22,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:22,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488351677] [2020-07-20 01:47:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:22,802 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 01:47:22,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488351677] [2020-07-20 01:47:22,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:22,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:47:22,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903712253] [2020-07-20 01:47:22,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:47:22,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:47:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:47:22,832 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 01:47:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:22,950 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 01:47:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:47:22,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 01:47:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:22,962 INFO L225 Difference]: With dead ends: 54 [2020-07-20 01:47:22,962 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:47:22,967 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 01:47:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:47:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 01:47:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:47:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 01:47:23,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 01:47:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:23,013 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 01:47:23,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:47:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 01:47:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:47:23,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:23,015 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 01:47:23,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:47:23,015 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:23,016 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 01:47:23,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:23,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433591977] [2020-07-20 01:47:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,146 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 01:47:23,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433591977] [2020-07-20 01:47:23,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:23,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:47:23,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052474337] [2020-07-20 01:47:23,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:47:23,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:23,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:47:23,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:47:23,151 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-20 01:47:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:23,268 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 01:47:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:47:23,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 01:47:23,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:23,270 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:47:23,271 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:47:23,272 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 01:47:23,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:47:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 01:47:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:47:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 01:47:23,281 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 01:47:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:23,281 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 01:47:23,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:47:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 01:47:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:47:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:23,283 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 01:47:23,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:47:23,284 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 01:47:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:23,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422888447] [2020-07-20 01:47:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:47:23,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422888447] [2020-07-20 01:47:23,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437186745] [2020-07-20 01:47:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78d90fbc 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 01:47:23,868 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@78d90fbc issued 4 check-sat command(s) [2020-07-20 01:47:23,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:47:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:23,958 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 01:47:23,959 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:23,968 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:23,969 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:47:23,969 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 01:47:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:24,012 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 01:47:24,013 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:24,026 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:24,028 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 01:47:24,029 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:30 [2020-07-20 01:47:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:24,228 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:24,229 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 01:47:24,232 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:24,273 INFO L624 ElimStorePlain]: treesize reduction 24, result has 64.7 percent of original size [2020-07-20 01:47:24,278 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 01:47:24,279 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:44 [2020-07-20 01:47:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:26,580 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:26,581 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2020-07-20 01:47:26,582 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:26,595 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:26,597 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 01:47:26,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:56, output treesize:10 [2020-07-20 01:47:26,635 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:47:26,703 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 01:47:26,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:47:26,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-07-20 01:47:26,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178968614] [2020-07-20 01:47:26,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 01:47:26,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:26,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 01:47:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=400, Unknown=1, NotChecked=0, Total=462 [2020-07-20 01:47:26,713 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 22 states. [2020-07-20 01:47:28,161 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-07-20 01:47:32,520 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 01:47:34,697 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 01:47:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:34,928 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2020-07-20 01:47:34,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:47:34,929 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-20 01:47:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:34,931 INFO L225 Difference]: With dead ends: 53 [2020-07-20 01:47:34,932 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 01:47:34,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=195, Invalid=1136, Unknown=1, NotChecked=0, Total=1332 [2020-07-20 01:47:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 01:47:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-07-20 01:47:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 01:47:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 01:47:34,942 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-07-20 01:47:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:34,943 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 01:47:34,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 01:47:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 01:47:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:47:34,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:34,945 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 01:47:35,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:47:35,159 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash -278067577, now seen corresponding path program 1 times [2020-07-20 01:47:35,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:35,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405456519] [2020-07-20 01:47:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:35,183 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:47:35,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946785327] [2020-07-20 01:47:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57ca0cb2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:35,236 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57ca0cb2 issued 3 check-sat command(s) [2020-07-20 01:47:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:47:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:35,266 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 01:47:35,267 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,272 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,273 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,273 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-20 01:47:35,335 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,336 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 01:47:35,337 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 01:47:35,347 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,349 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:47:35,350 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 01:47:35,351 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:28 [2020-07-20 01:47:35,352 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:47:35,380 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:47:35,381 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 01:47:35,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:47:35,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405456519] [2020-07-20 01:47:35,420 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:47:35,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946785327] [2020-07-20 01:47:35,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:47:35,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 01:47:35,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332927079] [2020-07-20 01:47:35,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:47:35,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:35,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:47:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:47:35,422 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 8 states. [2020-07-20 01:47:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:35,627 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-07-20 01:47:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:47:35,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-20 01:47:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:35,631 INFO L225 Difference]: With dead ends: 43 [2020-07-20 01:47:35,632 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 01:47:35,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 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 01:47:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 01:47:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 01:47:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 01:47:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 01:47:35,646 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 01:47:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:35,649 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 01:47:35,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:47:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 01:47:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:47:35,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:35,651 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 01:47:35,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:35,867 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 2 times [2020-07-20 01:47:35,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:35,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721630084] [2020-07-20 01:47:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:47:35,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721630084] [2020-07-20 01:47:35,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752192968] [2020-07-20 01:47:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@838f0a1 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 01:47:36,065 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@838f0a1 issued 4 check-sat command(s) [2020-07-20 01:47:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:47:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:36,112 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 01:47:36,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:47:36,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 01:47:36,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440628003] [2020-07-20 01:47:36,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:47:36,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:36,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:47:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:47:36,115 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-20 01:47:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:36,316 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 01:47:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:47:36,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 01:47:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:36,318 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:47:36,318 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:47:36,319 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 [2020-07-20 01:47:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:47:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 01:47:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:47:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 01:47:36,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 01:47:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:36,326 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 01:47:36,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:47:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 01:47:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:47:36,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:36,327 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 01:47:36,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:36,529 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 3 times [2020-07-20 01:47:36,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:36,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065012449] [2020-07-20 01:47:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@708751b6 [2020-07-20 01:47:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:36,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:36,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:36,612 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:47:36,612 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:47:36,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 01:47:36,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:47:36 BoogieIcfgContainer [2020-07-20 01:47:36,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:47:36,665 INFO L168 Benchmark]: Toolchain (without parser) took 14971.75 ms. Allocated memory was 137.4 MB in the beginning and 250.1 MB in the end (delta: 112.7 MB). Free memory was 102.9 MB in the beginning and 128.6 MB in the end (delta: -25.8 MB). Peak memory consumption was 87.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,665 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,666 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.43 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 91.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,667 INFO L168 Benchmark]: Boogie Preprocessor took 130.41 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 178.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,668 INFO L168 Benchmark]: RCFGBuilder took 402.56 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 161.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,669 INFO L168 Benchmark]: TraceAbstraction took 14162.90 ms. Allocated memory was 200.3 MB in the beginning and 250.1 MB in the end (delta: 49.8 MB). Free memory was 160.4 MB in the beginning and 128.6 MB in the end (delta: 31.8 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:36,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 269.43 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 91.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.41 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 178.2 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.56 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 161.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 14162.90 ms. Allocated memory was 200.3 MB in the beginning and 250.1 MB in the end (delta: 49.8 MB). Free memory was 160.4 MB in the beginning and 128.6 MB in the end (delta: 31.8 MB). Peak memory consumption was 81.6 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={5:0}] [L30] COND TRUE i