/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/loop-crafted/simple_array_index_value_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:51:05,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:51:05,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:51:05,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:51:05,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:51:05,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:51:05,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:51:05,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:51:05,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:51:05,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:51:05,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:51:05,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:51:05,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:51:05,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:51:05,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:51:05,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:51:05,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:51:05,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:51:05,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:51:05,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:51:05,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:51:05,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:51:05,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:51:05,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:51:05,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:51:05,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:51:05,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:51:05,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:51:05,561 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 17:51:05,575 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:51:05,576 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:51:05,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:51:05,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:51:05,577 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:51:05,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:51:05,578 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:51:05,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:51:05,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:51:05,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:51:05,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:51:05,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:51:05,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:51:05,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:51:05,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:51:05,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:51:05,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:51:05,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:51:05,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:51:05,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:51:05,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:51:05,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:05,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:51:05,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:51:05,582 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 17:51:05,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:51:05,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:51:05,905 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:51:05,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:51:05,907 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:51:05,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-20 17:51:05,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29cff88e/a381035da57a49afaf0f14e6f00a7fff/FLAG65793e8c4 [2020-07-20 17:51:06,366 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:51:06,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i [2020-07-20 17:51:06,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29cff88e/a381035da57a49afaf0f14e6f00a7fff/FLAG65793e8c4 [2020-07-20 17:51:06,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29cff88e/a381035da57a49afaf0f14e6f00a7fff [2020-07-20 17:51:06,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:51:06,762 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:51:06,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:06,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:51:06,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:51:06,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:06" (1/1) ... [2020-07-20 17:51:06,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f171bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:06, skipping insertion in model container [2020-07-20 17:51:06,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:51:06" (1/1) ... [2020-07-20 17:51:06,781 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:51:06,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:51:06,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:06,998 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:51:07,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:51:07,046 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:51:07,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07 WrapperNode [2020-07-20 17:51:07,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:51:07,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:51:07,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:51:07,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:51:07,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... [2020-07-20 17:51:07,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:51:07,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:51:07,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:51:07,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:51:07,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:51:07,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:51:07,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:51:07,293 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:51:07,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:51:07,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:51:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:51:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:51:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:51:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:51:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 17:51:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:51:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:51:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:51:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:51:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:51:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:51:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:51:07,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:51:07,671 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:51:07,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:07 BoogieIcfgContainer [2020-07-20 17:51:07,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:51:07,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:51:07,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:51:07,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:51:07,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:51:06" (1/3) ... [2020-07-20 17:51:07,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b93a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:07, skipping insertion in model container [2020-07-20 17:51:07,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:51:07" (2/3) ... [2020-07-20 17:51:07,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b93a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:51:07, skipping insertion in model container [2020-07-20 17:51:07,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:51:07" (3/3) ... [2020-07-20 17:51:07,684 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i [2020-07-20 17:51:07,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:51:07,703 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:51:07,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:51:07,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:51:07,746 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:51:07,746 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:51:07,746 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:51:07,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:51:07,747 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:51:07,747 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:51:07,747 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:51:07,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 17:51:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:51:07,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:07,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:07,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:07,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1561713717, now seen corresponding path program 1 times [2020-07-20 17:51:07,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:07,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529793017] [2020-07-20 17:51:07,795 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 17:51:07,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:51:07,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:07,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:51:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 17:51:07,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:07,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529793017] [2020-07-20 17:51:07,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:07,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:51:07,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049138524] [2020-07-20 17:51:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:51:07,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:51:07,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:51:07,976 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-20 17:51:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:51:08,023 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-07-20 17:51:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:51:08,025 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-20 17:51:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:51:08,035 INFO L225 Difference]: With dead ends: 59 [2020-07-20 17:51:08,036 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 17:51:08,040 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 [2020-07-20 17:51:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 17:51:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 17:51:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:51:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 17:51:08,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 22 [2020-07-20 17:51:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:51:08,090 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 17:51:08,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:51:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 17:51:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 17:51:08,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:08,093 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:08,307 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash -258750159, now seen corresponding path program 1 times [2020-07-20 17:51:08,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:08,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001633802] [2020-07-20 17:51:08,310 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 17:51:08,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:51:08,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:08,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 17:51:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:08,465 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:08,467 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:51:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 17:51:08,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:08,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001633802] [2020-07-20 17:51:08,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:08,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 17:51:08,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241816159] [2020-07-20 17:51:08,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 17:51:08,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 17:51:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:51:08,533 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-20 17:51:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:51:08,711 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-20 17:51:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 17:51:08,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 17:51:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:51:08,714 INFO L225 Difference]: With dead ends: 43 [2020-07-20 17:51:08,714 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 17:51:08,715 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 [2020-07-20 17:51:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 17:51:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-07-20 17:51:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 17:51:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-07-20 17:51:08,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2020-07-20 17:51:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:51:08,729 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-07-20 17:51:08,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 17:51:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-07-20 17:51:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 17:51:08,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:08,731 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] [2020-07-20 17:51:08,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:08,945 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1843057556, now seen corresponding path program 1 times [2020-07-20 17:51:08,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:08,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393123453] [2020-07-20 17:51:08,948 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 17:51:08,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:51:08,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:51:08,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:51:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:51:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 17:51:09,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:51:09,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393123453] [2020-07-20 17:51:09,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:51:09,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:51:09,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269894194] [2020-07-20 17:51:09,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:51:09,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:51:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:51:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:51:09,021 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 3 states. [2020-07-20 17:51:09,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:51:09,033 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2020-07-20 17:51:09,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:51:09,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-20 17:51:09,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:51:09,036 INFO L225 Difference]: With dead ends: 47 [2020-07-20 17:51:09,036 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 17:51:09,036 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 [2020-07-20 17:51:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 17:51:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-07-20 17:51:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 17:51:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 17:51:09,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 24 [2020-07-20 17:51:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:51:09,046 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 17:51:09,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:51:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 17:51:09,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 17:51:09,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:51:09,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:51:09,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:51:09,263 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:51:09,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:51:09,264 INFO L82 PathProgramCache]: Analyzing trace with hash -828791972, now seen corresponding path program 1 times [2020-07-20 17:51:09,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:51:09,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132151724] [2020-07-20 17:51:09,266 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