/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:41:05,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:41:05,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:41:05,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:41:05,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:41:05,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:41:05,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:41:05,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:41:05,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:41:05,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:41:05,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:41:05,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:41:05,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:41:05,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:41:05,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:41:05,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:41:05,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:41:05,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:41:05,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:41:05,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:41:05,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:41:05,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:41:05,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:41:05,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:41:05,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:41:05,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:41:05,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:41:05,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:41:05,819 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 11:41:05,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:41:05,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:41:05,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:41:05,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:41:05,848 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:41:05,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:41:05,849 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:41:05,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:41:05,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:41:05,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:41:05,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:41:05,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:41:05,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:41:05,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:41:05,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:41:05,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:41:05,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:41:05,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:41:05,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:41:05,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:41:05,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:41:05,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:05,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:41:05,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:41:05,853 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 -> NOT_INCREMENTALLY [2020-07-21 11:41:06,149 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:41:06,169 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:41:06,173 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:41:06,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:41:06,178 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:41:06,179 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-21 11:41:06,262 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4190a3a/81c8c5eef37b48b7aaa6b679bc31ce53/FLAGe0f0a5b48 [2020-07-21 11:41:06,776 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:41:06,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-21 11:41:06,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4190a3a/81c8c5eef37b48b7aaa6b679bc31ce53/FLAGe0f0a5b48 [2020-07-21 11:41:07,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd4190a3a/81c8c5eef37b48b7aaa6b679bc31ce53 [2020-07-21 11:41:07,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:41:07,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:41:07,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:41:07,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:41:07,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:41:07,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5957ebad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07, skipping insertion in model container [2020-07-21 11:41:07,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:41:07,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:41:07,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:41:07,355 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:41:07,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:41:07,412 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:41:07,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07 WrapperNode [2020-07-21 11:41:07,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:41:07,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:41:07,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:41:07,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:41:07,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (1/1) ... [2020-07-21 11:41:07,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:41:07,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:41:07,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:41:07,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:41:07,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (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 [2020-07-21 11:41:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:41:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:41:07,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:41:07,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:41:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:41:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:41:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:41:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:41:07,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:41:07,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:41:07,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:41:07,999 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:41:08,000 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:41:08,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:08 BoogieIcfgContainer [2020-07-21 11:41:08,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:41:08,008 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:41:08,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:41:08,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:41:08,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:41:07" (1/3) ... [2020-07-21 11:41:08,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed3dca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:08, skipping insertion in model container [2020-07-21 11:41:08,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:07" (2/3) ... [2020-07-21 11:41:08,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed3dca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:08, skipping insertion in model container [2020-07-21 11:41:08,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:08" (3/3) ... [2020-07-21 11:41:08,022 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-07-21 11:41:08,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:41:08,038 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-07-21 11:41:08,051 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-07-21 11:41:08,075 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:41:08,075 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:41:08,075 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:41:08,076 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:41:08,076 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:41:08,076 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:41:08,076 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:41:08,077 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:41:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 11:41:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:41:08,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:08,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:08,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1504353719, now seen corresponding path program 1 times [2020-07-21 11:41:08,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:08,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809375149] [2020-07-21 11:41:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:41:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:41:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:08,284 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 11:41:08,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:08,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809375149] [2020-07-21 11:41:08,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:08,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:41:08,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141685655] [2020-07-21 11:41:08,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:41:08,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:41:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:41:08,312 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-07-21 11:41:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:08,362 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2020-07-21 11:41:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:41:08,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 11:41:08,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:08,386 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:41:08,386 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 11:41:08,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 11:41:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 11:41:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-07-21 11:41:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 11:41:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-07-21 11:41:08,471 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2020-07-21 11:41:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:08,471 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-07-21 11:41:08,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:41:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-07-21 11:41:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:41:08,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:08,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:08,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:08,679 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:08,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1581018098, now seen corresponding path program 1 times [2020-07-21 11:41:08,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:08,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174863113] [2020-07-21 11:41:08,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:41:08,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:08,770 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 11:41:08,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:08,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174863113] [2020-07-21 11:41:08,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:08,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:41:08,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546938718] [2020-07-21 11:41:08,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:41:08,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:41:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:41:08,775 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2020-07-21 11:41:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:08,825 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-21 11:41:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:41:08,826 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-07-21 11:41:08,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:08,828 INFO L225 Difference]: With dead ends: 51 [2020-07-21 11:41:08,828 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 11:41:08,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:41:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 11:41:08,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2020-07-21 11:41:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:41:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-21 11:41:08,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2020-07-21 11:41:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:08,839 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-21 11:41:08,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:41:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-21 11:41:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:41:08,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:08,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:09,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:09,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:09,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1644741047, now seen corresponding path program 1 times [2020-07-21 11:41:09,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:09,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894167244] [2020-07-21 11:41:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:41:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:09,122 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 11:41:09,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:09,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894167244] [2020-07-21 11:41:09,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:09,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:41:09,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446730462] [2020-07-21 11:41:09,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:41:09,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:09,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:41:09,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:41:09,125 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-07-21 11:41:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:09,187 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-07-21 11:41:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:41:09,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-21 11:41:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:09,190 INFO L225 Difference]: With dead ends: 60 [2020-07-21 11:41:09,190 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 11:41:09,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 11:41:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 11:41:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-07-21 11:41:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 11:41:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 11:41:09,198 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2020-07-21 11:41:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:09,199 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 11:41:09,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:41:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 11:41:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 11:41:09,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:09,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:09,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:09,416 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1824116622, now seen corresponding path program 1 times [2020-07-21 11:41:09,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:09,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574115190] [2020-07-21 11:41:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:41:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:09,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 11:41:09,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:09,480 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 11:41:09,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:09,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574115190] [2020-07-21 11:41:09,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:09,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:41:09,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698753019] [2020-07-21 11:41:09,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:41:09,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:41:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:41:09,484 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2020-07-21 11:41:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:09,528 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 11:41:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:41:09,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-21 11:41:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:09,530 INFO L225 Difference]: With dead ends: 54 [2020-07-21 11:41:09,531 INFO L226 Difference]: Without dead ends: 34 [2020-07-21 11:41:09,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 11:41:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-21 11:41:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-07-21 11:41:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 11:41:09,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 11:41:09,553 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2020-07-21 11:41:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:09,553 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 11:41:09,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:41:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 11:41:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:41:09,554 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:09,555 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] [2020-07-21 11:41:09,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:09,769 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:09,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:09,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1385845809, now seen corresponding path program 1 times [2020-07-21 11:41:09,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:09,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510985777] [2020-07-21 11:41:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:41:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:41:10,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:10,237 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2020-07-21 11:41:10,238 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:41:10,243 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:41:10,244 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:41:10,244 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2020-07-21 11:41:12,568 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,574 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,576 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,580 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,608 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,611 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,621 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,629 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,631 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,635 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,641 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,649 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,651 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,657 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,664 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,667 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,669 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,670 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,675 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,682 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,683 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,690 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,695 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,696 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,698 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,702 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,714 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,715 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,721 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,729 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,730 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,731 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,735 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,737 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,739 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,742 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,748 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,749 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,750 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,752 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,755 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,756 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,761 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,767 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,768 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,769 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,770 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,784 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,787 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,789 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,798 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,799 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,801 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,804 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,806 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,807 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,817 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,820 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,821 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,825 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,829 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,830 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,835 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,838 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,839 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,840 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,844 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,846 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,847 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,849 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,854 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,856 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,858 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,860 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,874 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,875 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,878 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,885 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,886 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,888 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,891 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,894 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,895 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,897 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,902 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:41:12,903 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,904 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,905 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,910 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,912 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,913 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,915 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,917 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:41:12,918 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,919 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,921 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,923 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 11:41:12,924 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:12,927 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 11:41:17,258 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 84 DAG size of output: 1 [2020-07-21 11:41:21,687 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-07-21 11:41:26,182 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-07-21 11:41:30,512 WARN L193 SmtUtils]: Spent 4.27 s on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-07-21 11:41:34,952 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-07-21 11:41:41,374 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-07-21 11:41:41,504 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 11:41:41,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:41,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510985777] [2020-07-21 11:41:41,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:41,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 11:41:41,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944671398] [2020-07-21 11:41:41,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:41:41,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:41:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2020-07-21 11:41:41,507 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2020-07-21 11:41:49,980 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 11:41:52,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:52,148 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-21 11:41:52,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 11:41:52,149 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-21 11:41:52,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:52,150 INFO L225 Difference]: With dead ends: 44 [2020-07-21 11:41:52,150 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 11:41:52,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=41, Invalid=68, Unknown=1, NotChecked=0, Total=110 [2020-07-21 11:41:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 11:41:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-07-21 11:41:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 11:41:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-21 11:41:52,156 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2020-07-21 11:41:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:52,157 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-21 11:41:52,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:41:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-21 11:41:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:41:52,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:52,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:52,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:52,361 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash -624217503, now seen corresponding path program 1 times [2020-07-21 11:41:52,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:52,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405471242] [2020-07-21 11:41:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:52,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:41:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:53,561 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~main__index2~0 Int)) (and (< (mod main_~main__index2~0 4294967296) 100000) (< (mod c_main_~main__index1~0 4294967296) (mod main_~main__index2~0 4294967296)))) is different from true [2020-07-21 11:41:56,811 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 11:41:56,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:56,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405471242] [2020-07-21 11:41:56,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:56,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:41:56,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739320390] [2020-07-21 11:41:56,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:41:56,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:41:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=7, Unknown=2, NotChecked=4, Total=20 [2020-07-21 11:41:56,814 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2020-07-21 11:41:57,706 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 11:42:00,125 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 11:42:04,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:42:04,280 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2020-07-21 11:42:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:42:04,286 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-07-21 11:42:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:42:04,289 INFO L225 Difference]: With dead ends: 70 [2020-07-21 11:42:04,289 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 11:42:04,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14, Invalid=17, Unknown=3, NotChecked=8, Total=42 [2020-07-21 11:42:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 11:42:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2020-07-21 11:42:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:42:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 11:42:04,297 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2020-07-21 11:42:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:42:04,297 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 11:42:04,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:42:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 11:42:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:42:04,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:42:04,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:42:04,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:42:04,500 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:42:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:42:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -640274852, now seen corresponding path program 1 times [2020-07-21 11:42:04,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:42:04,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241550457] [2020-07-21 11:42:04,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:42:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:42:04,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 11:42:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:42:04,564 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 11:42:04,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:42:04,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241550457] [2020-07-21 11:42:04,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:42:04,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:42:04,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066837722] [2020-07-21 11:42:04,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:42:04,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:42:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:42:04,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:42:04,566 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 4 states. [2020-07-21 11:42:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:42:04,598 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 11:42:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:42:04,599 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 11:42:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:42:04,600 INFO L225 Difference]: With dead ends: 52 [2020-07-21 11:42:04,600 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 11:42:04,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:42:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 11:42:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-07-21 11:42:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 11:42:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-07-21 11:42:04,608 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2020-07-21 11:42:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:42:04,608 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-07-21 11:42:04,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:42:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-07-21 11:42:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:42:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:42:04,609 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:42:04,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:42:04,811 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:42:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:42:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash 358048683, now seen corresponding path program 1 times [2020-07-21 11:42:04,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:42:04,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949126943] [2020-07-21 11:42:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in