/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/s3iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:47:31,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:47:31,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:47:31,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 01:47:31,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:47:31,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:47:31,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:47:31,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:47:31,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:47:31,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:47:31,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:47:31,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:47:31,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:47:31,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:47:31,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:47:31,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:47:31,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:47:32,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:47:32,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:47:32,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:47:32,003 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 01:47:32,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:47:32,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:47:32,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:47:32,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:47:32,030 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:47:32,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:47:32,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:47:32,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:47:32,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:47:32,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:47:32,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:47:32,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:47:32,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:47:32,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:47:32,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:47:32,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:47:32,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:47:32,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:47:32,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:47:32,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:47:32,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:47:32,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:47:32,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:47:32,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:47:32,036 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 01:47:32,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:47:32,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:47:32,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:47:32,388 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:47:32,389 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:47:32,389 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-20 01:47:32,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a436c8fc1/9f714144fcb74744b46e0e0f1904e4df/FLAGd38d3f84c [2020-07-20 01:47:32,871 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:47:32,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s3iff.c [2020-07-20 01:47:32,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a436c8fc1/9f714144fcb74744b46e0e0f1904e4df/FLAGd38d3f84c [2020-07-20 01:47:33,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a436c8fc1/9f714144fcb74744b46e0e0f1904e4df [2020-07-20 01:47:33,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:47:33,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:47:33,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:33,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:47:33,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:47:33,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13fbcce3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33, skipping insertion in model container [2020-07-20 01:47:33,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:47:33,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:47:33,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:33,523 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:47:33,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:47:33,565 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:47:33,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33 WrapperNode [2020-07-20 01:47:33,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:47:33,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:47:33,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:47:33,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:47:33,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (1/1) ... [2020-07-20 01:47:33,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:47:33,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:47:33,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:47:33,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:47:33,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (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 01:47:33,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:47:33,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:47:33,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:47:33,828 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:47:33,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:47:33,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:47:33,829 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:47:33,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:47:33,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:47:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:47:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:47:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:47:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:47:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:47:33,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:47:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:47:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:47:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:47:34,147 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:47:34,147 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 01:47:34,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:34 BoogieIcfgContainer [2020-07-20 01:47:34,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:47:34,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:47:34,154 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:47:34,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:47:34,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:47:33" (1/3) ... [2020-07-20 01:47:34,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:34, skipping insertion in model container [2020-07-20 01:47:34,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:47:33" (2/3) ... [2020-07-20 01:47:34,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:47:34, skipping insertion in model container [2020-07-20 01:47:34,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:47:34" (3/3) ... [2020-07-20 01:47:34,180 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2020-07-20 01:47:34,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:47:34,212 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:47:34,228 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:47:34,254 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:47:34,255 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:47:34,255 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:47:34,255 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:47:34,255 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:47:34,255 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:47:34,256 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:47:34,256 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:47:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 01:47:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:47:34,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:34,286 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 01:47:34,286 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 01:47:34,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:34,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376344384] [2020-07-20 01:47:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,538 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 01:47:34,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376344384] [2020-07-20 01:47:34,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:34,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:47:34,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785359116] [2020-07-20 01:47:34,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:47:34,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:47:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:47:34,562 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-07-20 01:47:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:34,692 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 01:47:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:47:34,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 01:47:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:34,704 INFO L225 Difference]: With dead ends: 54 [2020-07-20 01:47:34,705 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:47:34,709 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 01:47:34,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:47:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 01:47:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:47:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 01:47:34,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 01:47:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:34,749 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 01:47:34,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:47:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 01:47:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:47:34,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:34,750 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 01:47:34,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:47:34,751 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 01:47:34,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:34,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807886728] [2020-07-20 01:47:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:34,881 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 01:47:34,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807886728] [2020-07-20 01:47:34,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:47:34,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:47:34,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288527491] [2020-07-20 01:47:34,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:47:34,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:34,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:47:34,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:47:34,886 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2020-07-20 01:47:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:35,034 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 01:47:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:47:35,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-20 01:47:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:35,036 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:47:35,037 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:47:35,038 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 01:47:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:47:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 01:47:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:47:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 01:47:35,047 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 01:47:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:35,047 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 01:47:35,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:47:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 01:47:35,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:47:35,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:35,049 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 01:47:35,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:47:35,050 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:35,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:35,050 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 01:47:35,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:35,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800412332] [2020-07-20 01:47:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:47:35,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800412332] [2020-07-20 01:47:35,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723526392] [2020-07-20 01:47:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@584e343c 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 01:47:35,590 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@584e343c issued 4 check-sat command(s) [2020-07-20 01:47:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:47:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:35,677 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 01:47:35,678 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,686 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,687 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-20 01:47:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:35,732 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 01:47:35,734 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,746 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,747 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-07-20 01:47:35,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:35,929 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:35,930 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 51 treesize of output 49 [2020-07-20 01:47:35,932 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:35,963 INFO L624 ElimStorePlain]: treesize reduction 16, result has 69.8 percent of original size [2020-07-20 01:47:35,967 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 01:47:35,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:37 [2020-07-20 01:47:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:47:36,045 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:36,045 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 33 treesize of output 25 [2020-07-20 01:47:36,047 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:47:36,055 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:47:36,056 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:47:36,057 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:10 [2020-07-20 01:47:36,087 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:47:36,137 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 01:47:36,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:47:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2020-07-20 01:47:36,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031395721] [2020-07-20 01:47:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:47:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:47:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:47:36,140 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 21 states. [2020-07-20 01:47:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:36,840 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-07-20 01:47:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:47:36,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-07-20 01:47:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:36,847 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:47:36,848 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 01:47:36,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:47:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 01:47:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-20 01:47:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:47:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 01:47:36,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-20 01:47:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:36,868 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 01:47:36,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:47:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 01:47:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:47:36,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:36,871 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 01:47:37,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 01:47:37,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:37,086 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-20 01:47:37,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:37,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402608502] [2020-07-20 01:47:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,178 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 01:47:37,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402608502] [2020-07-20 01:47:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547666532] [2020-07-20 01:47:37,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56ab5c92 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:37,236 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56ab5c92 issued 4 check-sat command(s) [2020-07-20 01:47:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:37,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:47:37,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:47:37,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:47:37,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 01:47:37,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027721590] [2020-07-20 01:47:37,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:47:37,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:37,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:47:37,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:47:37,286 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-07-20 01:47:37,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:37,525 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 01:47:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:47:37,526 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 01:47:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:37,527 INFO L225 Difference]: With dead ends: 45 [2020-07-20 01:47:37,527 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:47:37,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:47:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:47:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 01:47:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 01:47:37,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 01:47:37,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 01:47:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:37,541 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 01:47:37,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:47:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 01:47:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:47:37,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:37,544 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 01:47:37,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:37,760 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-20 01:47:37,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:37,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980973626] [2020-07-20 01:47:37,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:47:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:47:37,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980973626] [2020-07-20 01:47:37,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061287837] [2020-07-20 01:47:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45dcdf95 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 01:47:37,894 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45dcdf95 issued 4 check-sat command(s) [2020-07-20 01:47:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:47:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:47:37,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:47:37,947 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 01:47:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:47:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 01:47:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091654900] [2020-07-20 01:47:37,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:47:37,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:47:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:47:37,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:47:37,958 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 11 states. [2020-07-20 01:47:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:47:38,152 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 01:47:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:47:38,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 01:47:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:47:38,154 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:47:38,154 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:47:38,155 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 01:47:38,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:47:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 01:47:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 01:47:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 01:47:38,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 01:47:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:47:38,162 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 01:47:38,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:47:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 01:47:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:47:38,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:47:38,163 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 01:47:38,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:47:38,378 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:47:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:47:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-20 01:47:38,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:47:38,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138820379] [2020-07-20 01:47:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@34d879b6 [2020-07-20 01:47:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:38,403 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:47:38,425 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:47:38,458 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:47:38,458 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:47:38,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 01:47:38,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:47:38 BoogieIcfgContainer [2020-07-20 01:47:38,498 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:47:38,502 INFO L168 Benchmark]: Toolchain (without parser) took 5209.61 ms. Allocated memory was 145.8 MB in the beginning and 244.3 MB in the end (delta: 98.6 MB). Free memory was 103.5 MB in the beginning and 186.5 MB in the end (delta: -83.0 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,503 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.49 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 92.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,505 INFO L168 Benchmark]: Boogie Preprocessor took 169.15 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 180.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,506 INFO L168 Benchmark]: RCFGBuilder took 416.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,507 INFO L168 Benchmark]: TraceAbstraction took 4344.78 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 162.9 MB in the beginning and 186.5 MB in the end (delta: -23.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:47:38,511 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.49 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 92.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 169.15 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.8 MB in the beginning and 180.3 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 163.6 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4344.78 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 162.9 MB in the beginning and 186.5 MB in the end (delta: -23.5 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=2, sum={2:0}] [L30] COND TRUE i