/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 -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-d623d84 [2020-07-20 17:39:20,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:39:20,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:39:20,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:39:20,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:39:20,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:39:20,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:39:20,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:39:20,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:39:20,205 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:39:20,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:39:20,207 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:39:20,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:39:20,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:39:20,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:39:20,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:39:20,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:39:20,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:39:20,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:39:20,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:39:20,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:39:20,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:39:20,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:39:20,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:39:20,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:39:20,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:39:20,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:39:20,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:39:20,237 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 17:39:20,256 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:39:20,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:39:20,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:39:20,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:39:20,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:39:20,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:39:20,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:39:20,259 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:39:20,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:39:20,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:39:20,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:39:20,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:39:20,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:39:20,262 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:39:20,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:39:20,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:39:20,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:39:20,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:39:20,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:39:20,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:39:20,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:20,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:39:20,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:39:20,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 [2020-07-20 17:39:20,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:39:20,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:39:20,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:39:20,702 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:39:20,703 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:39:20,704 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 17:39:20,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f702cca66/f86679cf6df54c3a946aae4cb59ff2fb/FLAG32a31b75b [2020-07-20 17:39:21,315 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:39:21,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1iff.c [2020-07-20 17:39:21,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f702cca66/f86679cf6df54c3a946aae4cb59ff2fb/FLAG32a31b75b [2020-07-20 17:39:21,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f702cca66/f86679cf6df54c3a946aae4cb59ff2fb [2020-07-20 17:39:21,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:39:21,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:39:21,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:39:21,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:39:21,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:39:21,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:21" (1/1) ... [2020-07-20 17:39:21,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e70ca17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:21, skipping insertion in model container [2020-07-20 17:39:21,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:39:21" (1/1) ... [2020-07-20 17:39:21,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:39:21,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:39:21,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:39:21,969 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:39:21,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:39:22,016 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:39:22,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22 WrapperNode [2020-07-20 17:39:22,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:39:22,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:39:22,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:39:22,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:39:22,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (1/1) ... [2020-07-20 17:39:22,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:39:22,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:39:22,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:39:22,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:39:22,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (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 17:39:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:39:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:39:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:39:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:39:22,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:39:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:39:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:39:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:39:22,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:39:22,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:39:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:39:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:39:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:39:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:39:22,662 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:39:22,663 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:39:22,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:22 BoogieIcfgContainer [2020-07-20 17:39:22,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:39:22,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:39:22,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:39:22,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:39:22,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:39:21" (1/3) ... [2020-07-20 17:39:22,673 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387b696a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:22, skipping insertion in model container [2020-07-20 17:39:22,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:39:22" (2/3) ... [2020-07-20 17:39:22,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387b696a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:39:22, skipping insertion in model container [2020-07-20 17:39:22,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:39:22" (3/3) ... [2020-07-20 17:39:22,675 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-07-20 17:39:22,686 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:39:22,694 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:39:22,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:39:22,742 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:39:22,742 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:39:22,742 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:39:22,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:39:22,743 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:39:22,743 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:39:22,743 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:39:22,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:39:22,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 17:39:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:39:22,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:22,776 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 17:39:22,776 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:22,782 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 17:39:22,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:22,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469310563] [2020-07-20 17:39:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:22,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:39:22,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:22,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:39:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:22,934 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 17:39:22,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:39:22,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469310563] [2020-07-20 17:39:22,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:39:22,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:39:22,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636578685] [2020-07-20 17:39:22,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:39:22,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:39:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:39:22,959 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-20 17:39:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:22,983 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 17:39:22,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:39:22,985 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 17:39:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:22,993 INFO L225 Difference]: With dead ends: 54 [2020-07-20 17:39:22,993 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 17:39:22,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:39:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 17:39:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 17:39:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 17:39:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 17:39:23,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 17:39:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:23,039 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 17:39:23,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:39:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 17:39:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:39:23,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:23,041 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 17:39:23,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:23,256 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 17:39:23,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:23,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427493786] [2020-07-20 17:39:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:23,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:39:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:39:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:23,398 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 17:39:23,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:39:23,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427493786] [2020-07-20 17:39:23,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:39:23,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:39:23,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708922866] [2020-07-20 17:39:23,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:39:23,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:39:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:39:23,407 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-20 17:39:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:23,497 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 17:39:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:39:23,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 17:39:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:23,500 INFO L225 Difference]: With dead ends: 40 [2020-07-20 17:39:23,500 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 17:39:23,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:39:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 17:39:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 17:39:23,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:39:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 17:39:23,511 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 17:39:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:23,511 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 17:39:23,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:39:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 17:39:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:39:23,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:23,513 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 17:39:23,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:23,729 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 17:39:23,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:23,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30399401] [2020-07-20 17:39:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:23,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:39:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:23,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 17:39:23,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:23,875 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 17:39:23,876 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:39:23,888 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:39:23,889 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:39:23,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-07-20 17:39:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:39:23,925 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 17:39:23,927 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:39:23,946 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:39:23,947 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:39:23,948 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-07-20 17:39:24,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:39:24,096 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:39:24,097 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 47 treesize of output 45 [2020-07-20 17:39:24,099 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:39:24,151 INFO L624 ElimStorePlain]: treesize reduction 16, result has 74.2 percent of original size [2020-07-20 17:39:24,153 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 17:39:24,154 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:46 [2020-07-20 17:39:24,307 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 17:39:24,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 17:39:24,311 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 12 [2020-07-20 17:39:24,313 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:39:24,327 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:39:24,329 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:39:24,330 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:58, output treesize:10 [2020-07-20 17:39:24,356 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 17:39:24,403 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 17:39:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:39:24,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:39:24,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 17:39:25,007 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 17:39:25,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30399401] [2020-07-20 17:39:25,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:39:25,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 17:39:25,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437814251] [2020-07-20 17:39:25,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 17:39:25,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 17:39:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-07-20 17:39:25,016 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 22 states. [2020-07-20 17:39:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:26,217 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-07-20 17:39:26,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 17:39:26,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-07-20 17:39:26,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:26,223 INFO L225 Difference]: With dead ends: 50 [2020-07-20 17:39:26,223 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 17:39:26,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2020-07-20 17:39:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 17:39:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-20 17:39:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 17:39:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-20 17:39:26,237 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-20 17:39:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:26,238 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-20 17:39:26,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 17:39:26,238 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-20 17:39:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 17:39:26,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:26,240 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 17:39:26,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:26,452 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-20 17:39:26,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:26,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871736423] [2020-07-20 17:39:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:26,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:39:26,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:39:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:26,546 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 17:39:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:39:26,590 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 17:39:26,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871736423] [2020-07-20 17:39:26,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:39:26,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 17:39:26,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127088498] [2020-07-20 17:39:26,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:39:26,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:39:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:39:26,593 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-20 17:39:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:26,768 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-20 17:39:26,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 17:39:26,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-20 17:39:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:26,773 INFO L225 Difference]: With dead ends: 45 [2020-07-20 17:39:26,773 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:39:26,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 17:39:26,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:39:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-20 17:39:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 17:39:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-20 17:39:26,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-20 17:39:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:26,781 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-20 17:39:26,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:39:26,781 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-20 17:39:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 17:39:26,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:26,782 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 17:39:26,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:26,996 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-20 17:39:26,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:26,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852367417] [2020-07-20 17:39:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:27,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:39:27,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:39:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 17:39:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:39:27,114 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 17:39:27,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 17:39:27,174 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 17:39:27,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852367417] [2020-07-20 17:39:27,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 17:39:27,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 17:39:27,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799212666] [2020-07-20 17:39:27,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 17:39:27,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:39:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 17:39:27,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-20 17:39:27,178 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-20 17:39:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:39:27,328 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-20 17:39:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 17:39:27,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-20 17:39:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:39:27,330 INFO L225 Difference]: With dead ends: 49 [2020-07-20 17:39:27,330 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 17:39:27,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-20 17:39:27,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 17:39:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-20 17:39:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 17:39:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 17:39:27,344 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 17:39:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:39:27,345 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 17:39:27,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 17:39:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 17:39:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 17:39:27,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:39:27,348 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 17:39:27,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:27,550 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:39:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:39:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-20 17:39:27,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:39:27,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754082644] [2020-07-20 17:39:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:27,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:39:27,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:39:27,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:39:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:39:27,619 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:39:27,646 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:39:27,646 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:39:27,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:39:27,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:39:27 BoogieIcfgContainer [2020-07-20 17:39:27,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:39:27,906 INFO L168 Benchmark]: Toolchain (without parser) took 6245.60 ms. Allocated memory was 146.8 MB in the beginning and 242.7 MB in the end (delta: 95.9 MB). Free memory was 104.1 MB in the beginning and 176.0 MB in the end (delta: -71.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,907 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.37 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,909 INFO L168 Benchmark]: Boogie Preprocessor took 204.81 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.4 MB in the beginning and 180.0 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,909 INFO L168 Benchmark]: RCFGBuilder took 443.22 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 163.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,910 INFO L168 Benchmark]: TraceAbstraction took 5235.99 ms. Allocated memory was 202.4 MB in the beginning and 242.7 MB in the end (delta: 40.4 MB). Free memory was 162.5 MB in the beginning and 176.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:39:27,914 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 146.8 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.37 ms. Allocated memory is still 146.8 MB. Free memory was 103.7 MB in the beginning and 93.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 204.81 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.4 MB in the beginning and 180.0 MB in the end (delta: -86.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 443.22 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 163.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5235.99 ms. Allocated memory was 202.4 MB in the beginning and 242.7 MB in the end (delta: 40.4 MB). Free memory was 162.5 MB in the beginning and 176.0 MB in the end (delta: -13.6 MB). Peak memory consumption was 26.8 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)=7, 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={31892:0}, i=0, malloc(sizeof(int)*N)={31892:0}, N=2, sum={31894:0}] [L30] COND TRUE i