/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:45:54,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:45:54,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:45:54,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:45:54,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:45:54,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:45:54,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:45:54,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:45:55,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:45:55,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:45:55,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:45:55,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:45:55,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:45:55,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:45:55,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:45:55,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:45:55,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:45:55,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:45:55,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:45:55,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:45:55,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:45:55,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:45:55,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:45:55,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:45:55,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:45:55,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:45:55,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:45:55,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:45:55,090 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 [2020-07-21 16:45:55,124 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:45:55,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:45:55,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:45:55,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:45:55,128 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:45:55,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:45:55,128 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:45:55,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:45:55,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:45:55,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:45:55,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:45:55,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:45:55,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:45:55,130 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:45:55,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:45:55,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:45:55,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:45:55,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:45:55,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:45:55,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:45:55,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:45:55,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:45:55,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:45:55,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:45:55,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:45:55,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:45:55,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:55,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:45:55,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:45:55,133 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 -> 2 [2020-07-21 16:45:55,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:45:55,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:45:55,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:45:55,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:45:55,579 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:45:55,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-21 16:45:55,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2005d92e/b58961c6b5284c86aca1a63e5a120a2d/FLAG518cc800b [2020-07-21 16:45:56,313 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:45:56,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-21 16:45:56,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2005d92e/b58961c6b5284c86aca1a63e5a120a2d/FLAG518cc800b [2020-07-21 16:45:56,586 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2005d92e/b58961c6b5284c86aca1a63e5a120a2d [2020-07-21 16:45:56,602 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:45:56,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:45:56,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:45:56,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:45:56,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:45:56,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:45:56" (1/1) ... [2020-07-21 16:45:56,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f275fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:56, skipping insertion in model container [2020-07-21 16:45:56,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:45:56" (1/1) ... [2020-07-21 16:45:56,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:45:56,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:45:56,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:45:56,980 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:45:57,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:45:57,054 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:45:57,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57 WrapperNode [2020-07-21 16:45:57,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:45:57,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:45:57,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:45:57,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:45:57,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (1/1) ... [2020-07-21 16:45:57,265 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:45:57,266 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:45:57,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:45:57,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:45:57,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (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 [2020-07-21 16:45:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:45:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:45:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:45:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:45:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:45:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:45:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:45:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:45:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:45:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 16:45:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:45:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:45:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:45:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:45:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:45:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:45:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:45:57,912 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:45:57,913 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 16:45:57,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:45:57 BoogieIcfgContainer [2020-07-21 16:45:57,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:45:57,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:45:57,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:45:57,928 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:45:57,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:45:56" (1/3) ... [2020-07-21 16:45:57,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130573a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:45:57, skipping insertion in model container [2020-07-21 16:45:57,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:45:57" (2/3) ... [2020-07-21 16:45:57,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130573a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:45:57, skipping insertion in model container [2020-07-21 16:45:57,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:45:57" (3/3) ... [2020-07-21 16:45:57,935 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-07-21 16:45:57,953 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:45:57,965 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:45:57,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:45:58,026 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:45:58,027 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:45:58,027 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:45:58,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:45:58,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:45:58,028 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:45:58,028 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:45:58,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:45:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 16:45:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:45:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:58,066 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:45:58,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1561713717, now seen corresponding path program 1 times [2020-07-21 16:45:58,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:58,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126450996] [2020-07-21 16:45:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:45:58,213 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:45:58,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:45:58,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:45:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:45:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 16:45:58,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:45:58,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126450996] [2020-07-21 16:45:58,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:45:58,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:45:58,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153497577] [2020-07-21 16:45:58,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:45:58,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:45:58,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:45:58,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:45:58,294 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-21 16:45:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:45:58,339 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-07-21 16:45:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:45:58,341 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 16:45:58,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:45:58,357 INFO L225 Difference]: With dead ends: 59 [2020-07-21 16:45:58,358 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 16:45:58,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:45:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 16:45:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 16:45:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 16:45:58,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 16:45:58,437 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 22 [2020-07-21 16:45:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:45:58,438 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 16:45:58,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:45:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 16:45:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 16:45:58,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:58,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:45:58,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:58,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:58,660 INFO L82 PathProgramCache]: Analyzing trace with hash -258750159, now seen corresponding path program 1 times [2020-07-21 16:45:58,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:58,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978893228] [2020-07-21 16:45:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:45:58,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:45:58,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:45:58,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:45:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:45:58,833 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:45:58,836 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:45:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:45:58,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:45:58,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978893228] [2020-07-21 16:45:58,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:45:58,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:45:58,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672308431] [2020-07-21 16:45:58,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:45:58,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:45:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:45:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:45:58,934 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-21 16:45:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:45:59,194 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-21 16:45:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:45:59,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-21 16:45:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:45:59,198 INFO L225 Difference]: With dead ends: 37 [2020-07-21 16:45:59,198 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 16:45:59,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:45:59,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 16:45:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 16:45:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:45:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 16:45:59,216 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-07-21 16:45:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:45:59,217 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 16:45:59,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:45:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 16:45:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:45:59,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:59,219 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] [2020-07-21 16:45:59,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:59,436 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1843057556, now seen corresponding path program 1 times [2020-07-21 16:45:59,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:59,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962750998] [2020-07-21 16:45:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 16:45:59,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:45:59,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:45:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:45:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:45:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:45:59,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:45:59,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962750998] [2020-07-21 16:45:59,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:45:59,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:45:59,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912462089] [2020-07-21 16:45:59,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:45:59,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:45:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:45:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:45:59,533 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 3 states. [2020-07-21 16:45:59,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:45:59,562 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-07-21 16:45:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:45:59,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 16:45:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:45:59,568 INFO L225 Difference]: With dead ends: 47 [2020-07-21 16:45:59,568 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 16:45:59,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:45:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 16:45:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-07-21 16:45:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 16:45:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 16:45:59,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2020-07-21 16:45:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:45:59,589 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 16:45:59,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:45:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 16:45:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 16:45:59,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:45:59,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1] [2020-07-21 16:45:59,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:45:59,809 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:45:59,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:45:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash -506278145, now seen corresponding path program 1 times [2020-07-21 16:45:59,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:45:59,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488200451] [2020-07-21 16:45:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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