/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-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:06:05,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:06:05,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:06:05,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:06:05,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:06:05,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:06:05,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:06:05,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:06:05,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:06:05,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:06:05,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:06:05,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:06:05,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:06:05,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:06:05,110 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:06:05,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:06:05,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:06:05,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:06:05,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:06:05,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:06:05,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:06:05,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:06:05,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:06:05,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:06:05,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:06:05,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:06:05,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:06:05,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:06:05,174 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 18:06:05,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:06:05,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:06:05,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:06:05,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:06:05,203 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:06:05,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:06:05,204 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:06:05,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:06:05,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:06:05,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:06:05,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:06:05,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:06:05,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:06:05,205 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:06:05,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:06:05,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:06:05,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:06:05,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:06:05,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:06:05,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:06:05,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:06:05,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:06:05,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:06:05,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:06:05,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:06:05,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:06:05,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:06:05,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:06:05,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:06:05,208 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 18:06:05,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:06:05,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:06:05,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:06:05,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:06:05,580 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:06:05,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-07-20 18:06:05,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926423005/64230621c8324de9bd057c43b39e6667/FLAG584536203 [2020-07-20 18:06:06,424 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:06:06,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2020-07-20 18:06:06,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926423005/64230621c8324de9bd057c43b39e6667/FLAG584536203 [2020-07-20 18:06:06,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/926423005/64230621c8324de9bd057c43b39e6667 [2020-07-20 18:06:06,632 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:06:06,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:06:06,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:06:06,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:06:06,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:06:06,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:06:06" (1/1) ... [2020-07-20 18:06:06,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@718f445c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:06, skipping insertion in model container [2020-07-20 18:06:06,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:06:06" (1/1) ... [2020-07-20 18:06:06,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:06:06,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:06:07,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:06:07,128 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:06:07,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:06:07,424 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:06:07,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07 WrapperNode [2020-07-20 18:06:07,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:06:07,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:06:07,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:06:07,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:06:07,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (1/1) ... [2020-07-20 18:06:07,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:06:07,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:06:07,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:06:07,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:06:07,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (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 18:06:07,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:06:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:06:07,678 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:06:07,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:06:07,679 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 18:06:07,680 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 18:06:07,680 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:06:07,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 18:06:07,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 18:06:07,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 18:06:07,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 18:06:07,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 18:06:07,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 18:06:07,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:06:07,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:06:07,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 18:06:07,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 18:06:11,255 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:06:11,256 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:06:11,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:06:11 BoogieIcfgContainer [2020-07-20 18:06:11,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:06:11,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:06:11,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:06:11,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:06:11,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:06:06" (1/3) ... [2020-07-20 18:06:11,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13df182c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:06:11, skipping insertion in model container [2020-07-20 18:06:11,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:06:07" (2/3) ... [2020-07-20 18:06:11,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13df182c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:06:11, skipping insertion in model container [2020-07-20 18:06:11,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:06:11" (3/3) ... [2020-07-20 18:06:11,303 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2020-07-20 18:06:11,343 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:06:11,373 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:06:11,390 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:06:11,427 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:06:11,428 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:06:11,428 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:06:11,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:06:11,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:06:11,428 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:06:11,428 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:06:11,428 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:06:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-20 18:06:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 18:06:11,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:06:11,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:06:11,467 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:06:11,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:06:11,475 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2020-07-20 18:06:11,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:06:11,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274523357] [2020-07-20 18:06:11,485 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 18:06:33,356 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:06:33,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:06:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 18:06:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:06:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:06:33,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:06:33,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274523357] [2020-07-20 18:06:33,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:06:33,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-20 18:06:33,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790315545] [2020-07-20 18:06:33,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 18:06:33,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:06:33,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 18:06:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-07-20 18:06:33,889 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 13 states. [2020-07-20 18:06:54,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:06:54,383 INFO L93 Difference]: Finished difference Result 90 states and 134 transitions. [2020-07-20 18:06:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 18:06:54,386 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-07-20 18:06:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:06:54,418 INFO L225 Difference]: With dead ends: 90 [2020-07-20 18:06:54,419 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 18:06:54,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:06:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 18:06:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-07-20 18:06:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 18:06:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-20 18:06:54,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2020-07-20 18:06:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:06:54,499 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-20 18:06:54,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 18:06:54,500 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-20 18:06:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 18:06:54,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:06:54,503 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:06:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:06:54,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:06:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:06:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2020-07-20 18:06:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:06:54,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227768537] [2020-07-20 18:06:54,720 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 18:07:12,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:07:12,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:07:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 18:07:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:07:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:07:12,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:07:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:07:17,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227768537] [2020-07-20 18:07:17,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:07:17,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 18:07:17,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926216771] [2020-07-20 18:07:17,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 18:07:17,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:07:17,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 18:07:17,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=477, Unknown=2, NotChecked=0, Total=650 [2020-07-20 18:07:17,635 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 26 states. [2020-07-20 18:07:31,136 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 13 [2020-07-20 18:07:31,772 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 15 [2020-07-20 18:07:37,045 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 18:07:43,908 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 18:07:48,632 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 18:07:54,497 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 18:07:59,229 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 35 DAG size of output: 15 [2020-07-20 18:08:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:08:25,935 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2020-07-20 18:08:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-20 18:08:25,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-07-20 18:08:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:08:25,940 INFO L225 Difference]: With dead ends: 114 [2020-07-20 18:08:25,940 INFO L226 Difference]: Without dead ends: 111 [2020-07-20 18:08:25,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=663, Invalid=1778, Unknown=9, NotChecked=0, Total=2450 [2020-07-20 18:08:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-20 18:08:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-07-20 18:08:25,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 18:08:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-07-20 18:08:25,956 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 53 [2020-07-20 18:08:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:08:25,957 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-07-20 18:08:25,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 18:08:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-07-20 18:08:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 18:08:25,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:08:25,961 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:08:26,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:08:26,176 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:08:26,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:08:26,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1225313146, now seen corresponding path program 2 times [2020-07-20 18:08:26,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:08:26,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539847216] [2020-07-20 18:08:26,179 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 18:08:55,447 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:08:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:08:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 18:08:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:08:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:08:56,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:09:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 351 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:09:20,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539847216] [2020-07-20 18:09:20,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:09:20,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-20 18:09:20,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950548366] [2020-07-20 18:09:20,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 18:09:20,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:09:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 18:09:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1668, Unknown=11, NotChecked=0, Total=2256 [2020-07-20 18:09:20,649 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 48 states. [2020-07-20 18:09:41,933 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 104 DAG size of output: 14 [2020-07-20 18:09:48,291 WARN L193 SmtUtils]: Spent 3.02 s on a formula simplification. DAG size of input: 105 DAG size of output: 15 [2020-07-20 18:09:51,797 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 15 [2020-07-20 18:10:05,895 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-20 18:10:13,335 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 90 DAG size of output: 15 [2020-07-20 18:10:25,231 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-07-20 18:10:40,714 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-20 18:10:57,531 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 70 DAG size of output: 15 [2020-07-20 18:11:03,865 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 75 DAG size of output: 15 [2020-07-20 18:11:15,582 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 15 [2020-07-20 18:11:27,076 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 60 DAG size of output: 20 [2020-07-20 18:11:36,244 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 55 DAG size of output: 15 [2020-07-20 18:11:46,060 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 50 DAG size of output: 15 [2020-07-20 18:12:00,226 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 18:12:15,649 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2020-07-20 18:12:29,799 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 25 DAG size of output: 15 [2020-07-20 18:12:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:12:43,305 INFO L93 Difference]: Finished difference Result 214 states and 233 transitions. [2020-07-20 18:12:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 18:12:43,307 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 108 [2020-07-20 18:12:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:12:43,310 INFO L225 Difference]: With dead ends: 214 [2020-07-20 18:12:43,310 INFO L226 Difference]: Without dead ends: 211 [2020-07-20 18:12:43,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 198.2s TimeCoverageRelationStatistics Valid=2137, Invalid=6212, Unknown=23, NotChecked=0, Total=8372 [2020-07-20 18:12:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-20 18:12:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2020-07-20 18:12:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-07-20 18:12:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2020-07-20 18:12:43,335 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 108 [2020-07-20 18:12:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:12:43,335 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2020-07-20 18:12:43,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 18:12:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2020-07-20 18:12:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 18:12:43,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:12:43,344 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:12:43,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:12:43,550 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:12:43,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:12:43,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1754198202, now seen corresponding path program 3 times [2020-07-20 18:12:43,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:12:43,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48917204] [2020-07-20 18:12:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:18:05,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:18:05,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:18:07,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1999 conjuncts, 89 conjunts are in the unsatisfiable core [2020-07-20 18:18:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:18:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:18:09,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:19:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:19:04,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48917204] [2020-07-20 18:19:04,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:19:04,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2020-07-20 18:19:04,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190064360] [2020-07-20 18:19:04,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-07-20 18:19:04,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:19:04,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-07-20 18:19:04,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1077, Invalid=6555, Unknown=24, NotChecked=0, Total=7656 [2020-07-20 18:19:04,699 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 88 states. [2020-07-20 18:19:29,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:19:29,377 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2020-07-20 18:19:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-20 18:19:29,380 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 208 [2020-07-20 18:19:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:19:29,383 INFO L225 Difference]: With dead ends: 220 [2020-07-20 18:19:29,383 INFO L226 Difference]: Without dead ends: 217 [2020-07-20 18:19:29,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 60.3s TimeCoverageRelationStatistics Valid=2155, Invalid=14851, Unknown=24, NotChecked=0, Total=17030 [2020-07-20 18:19:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-20 18:19:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-07-20 18:19:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-20 18:19:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2020-07-20 18:19:29,409 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 208 [2020-07-20 18:19:29,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:19:29,410 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2020-07-20 18:19:29,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-07-20 18:19:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2020-07-20 18:19:29,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-20 18:19:29,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:19:29,415 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:19:29,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:19:29,629 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:19:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:19:29,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1730716041, now seen corresponding path program 4 times [2020-07-20 18:19:29,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:19:29,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922889830] [2020-07-20 18:19:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:20:12,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:20:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:20:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 127 conjunts are in the unsatisfiable core [2020-07-20 18:20:12,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:20:14,903 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-07-20 18:20:14,905 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 18:20:14,910 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 18:20:14,910 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 18:20:14,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-07-20 18:20:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:20:15,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:20:15,267 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 18:20:15,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:20:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:20:39,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922889830] [2020-07-20 18:20:39,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:20:39,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2020-07-20 18:20:39,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452168049] [2020-07-20 18:20:39,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-07-20 18:20:39,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:20:39,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-07-20 18:20:39,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7784, Unknown=5, NotChecked=0, Total=8010 [2020-07-20 18:20:39,585 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand 90 states.