/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 DAGSIZE --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-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:46:58,135 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 20:46:58,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:46:58,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:46:58,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:46:58,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:46:58,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:46:58,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:46:58,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:46:58,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:46:58,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:46:58,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:46:58,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:46:58,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:46:58,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:46:58,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:46:58,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:46:58,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:46:58,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:46:58,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:46:58,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:46:58,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:46:58,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:46:58,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:46:58,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:46:58,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:46:58,301 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 20:46:58,368 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:46:58,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:46:58,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:46:58,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:46:58,376 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:46:58,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:46:58,379 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:46:58,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:46:58,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:46:58,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:46:58,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:46:58,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:46:58,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:46:58,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:46:58,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:46:58,385 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:46:58,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:46:58,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:46:58,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:46:58,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:46:58,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:46:58,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:46:58,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:46:58,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:46:58,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:46:58,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:46:58,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:46:58,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:46:58,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:46:58,390 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 -> DAGSIZE 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 20:46:58,915 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:46:58,941 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:46:58,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:46:58,949 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:46:58,950 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:46:58,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-07-21 20:46:59,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035200afc/e1954aeca1394640ab492a47597db46b/FLAGaef7b5faf [2020-07-21 20:46:59,929 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:46:59,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-07-21 20:46:59,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035200afc/e1954aeca1394640ab492a47597db46b/FLAGaef7b5faf [2020-07-21 20:47:00,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035200afc/e1954aeca1394640ab492a47597db46b [2020-07-21 20:47:00,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:47:00,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:47:00,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:47:00,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:47:00,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:47:00,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ab6d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00, skipping insertion in model container [2020-07-21 20:47:00,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:47:00,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:47:00,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:47:00,480 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:47:00,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:47:00,534 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:47:00,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00 WrapperNode [2020-07-21 20:47:00,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:47:00,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:47:00,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:47:00,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:47:00,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (1/1) ... [2020-07-21 20:47:00,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:47:00,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:47:00,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:47:00,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:47:00,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (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 20:47:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:47:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:47:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:47:00,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:47:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:47:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:47:00,864 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:47:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:47:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:47:00,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:47:01,198 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:47:01,198 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:47:01,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:01 BoogieIcfgContainer [2020-07-21 20:47:01,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:47:01,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:47:01,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:47:01,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:47:01,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:47:00" (1/3) ... [2020-07-21 20:47:01,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c27589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:01, skipping insertion in model container [2020-07-21 20:47:01,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:00" (2/3) ... [2020-07-21 20:47:01,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c27589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:01, skipping insertion in model container [2020-07-21 20:47:01,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:01" (3/3) ... [2020-07-21 20:47:01,226 INFO L109 eAbstractionObserver]: Analyzing ICFG mod3.c [2020-07-21 20:47:01,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:47:01,268 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:47:01,296 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:47:01,343 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:47:01,343 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:47:01,343 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:47:01,344 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:47:01,344 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:47:01,344 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:47:01,344 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:47:01,345 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:47:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 20:47:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 20:47:01,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:47:01,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:47:01,393 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:47:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:47:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash 271538127, now seen corresponding path program 1 times [2020-07-21 20:47:01,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:47:01,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857315472] [2020-07-21 20:47:01,418 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 20:47:01,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:47:01,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:47:01,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:47:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:47:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:47:01,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:47:01,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857315472] [2020-07-21 20:47:01,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:47:01,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:47:01,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916424860] [2020-07-21 20:47:01,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:47:01,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:47:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:47:01,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:47:01,708 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-07-21 20:47:01,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:47:01,796 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2020-07-21 20:47:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:47:01,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-07-21 20:47:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:47:01,811 INFO L225 Difference]: With dead ends: 45 [2020-07-21 20:47:01,812 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 20:47:01,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 20:47:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 20:47:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-07-21 20:47:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 20:47:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-07-21 20:47:01,871 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-07-21 20:47:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:47:01,871 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-07-21 20:47:01,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:47:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-07-21 20:47:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:47:01,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:47:01,873 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:47:02,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:47:02,089 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:47:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:47:02,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1587594336, now seen corresponding path program 1 times [2020-07-21 20:47:02,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:47:02,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060794482] [2020-07-21 20:47:02,093 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