/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/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:11:54,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:11:54,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:11:54,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:11:54,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:11:54,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:11:54,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:11:54,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:11:54,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:11:54,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:11:54,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:11:54,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:11:54,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:11:54,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:11:54,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:11:54,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:11:54,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:11:54,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:11:54,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:11:54,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:11:54,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:11:54,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:11:54,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:11:54,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:11:54,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:11:54,133 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:11:54,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:11:54,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:11:54,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:11:54,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 12:11:54,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 12:11:54,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 12:11:54,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 12:11:54,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 12:11:54,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 12:11:54,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 12:11:54,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 12:11:54,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 12:11:54,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:11:54,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:11:54,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:11:54,149 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 12:11:54,187 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:11:54,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:11:54,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:11:54,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:11:54,192 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:11:54,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:11:54,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:11:54,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:11:54,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:11:54,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:11:54,193 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:11:54,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:11:54,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:11:54,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:11:54,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:11:54,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:11:54,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:11:54,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:11:54,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:11:54,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:11:54,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:11:54,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:11:54,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:11:54,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:11:54,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:11:54,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:11:54,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:54,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:11:54,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:11:54,203 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 12:11:54,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:11:54,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:11:54,498 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:11:54,500 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:11:54,500 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:11:54,502 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 12:11:54,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e6e194/1c2c84effc364581a7323c115adf2d5a/FLAGc2339a0e7 [2020-07-21 12:11:55,055 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:11:55,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 12:11:55,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e6e194/1c2c84effc364581a7323c115adf2d5a/FLAGc2339a0e7 [2020-07-21 12:11:55,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060e6e194/1c2c84effc364581a7323c115adf2d5a [2020-07-21 12:11:55,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:11:55,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:11:55,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:11:55,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:11:55,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:11:55,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d84c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55, skipping insertion in model container [2020-07-21 12:11:55,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:11:55,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:11:55,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:11:55,671 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:11:55,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:11:55,706 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:11:55,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55 WrapperNode [2020-07-21 12:11:55,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:11:55,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:11:55,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:11:55,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:11:55,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (1/1) ... [2020-07-21 12:11:55,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:11:55,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:11:55,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:11:55,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:11:55,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (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 12:11:55,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:11:55,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:11:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:11:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:11:55,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:11:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:11:55,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:11:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:11:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:11:55,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:11:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:11:55,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:11:55,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:11:56,128 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:11:56,129 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:11:56,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:11:56 BoogieIcfgContainer [2020-07-21 12:11:56,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:11:56,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:11:56,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:11:56,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:11:56,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:11:55" (1/3) ... [2020-07-21 12:11:56,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9eb059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:11:56, skipping insertion in model container [2020-07-21 12:11:56,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:11:55" (2/3) ... [2020-07-21 12:11:56,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9eb059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:11:56, skipping insertion in model container [2020-07-21 12:11:56,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:11:56" (3/3) ... [2020-07-21 12:11:56,157 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-21 12:11:56,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:11:56,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:11:56,212 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:11:56,245 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:11:56,246 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:11:56,246 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:11:56,246 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:11:56,246 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:11:56,246 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:11:56,246 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:11:56,246 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:11:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 12:11:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:11:56,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:56,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:56,271 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:56,276 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 12:11:56,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:56,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342572732] [2020-07-21 12:11:56,284 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 12:11:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:11:56,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:56,364 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 12:11:56,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:11:56,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342572732] [2020-07-21 12:11:56,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:11:56,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:11:56,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117487897] [2020-07-21 12:11:56,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:11:56,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:11:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:11:56,386 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 12:11:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:56,407 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 12:11:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:11:56,408 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 12:11:56,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:56,416 INFO L225 Difference]: With dead ends: 35 [2020-07-21 12:11:56,416 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 12:11:56,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:11:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 12:11:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 12:11:56,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 12:11:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 12:11:56,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 12:11:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:56,456 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 12:11:56,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:11:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 12:11:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:11:56,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:56,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:56,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:56,674 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 12:11:56,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:56,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692648354] [2020-07-21 12:11:56,676 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 12:11:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:11:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:56,782 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 12:11:56,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:11:56,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692648354] [2020-07-21 12:11:56,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:11:56,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:11:56,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851745691] [2020-07-21 12:11:56,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:11:56,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:11:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:11:56,787 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 12:11:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:56,853 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 12:11:56,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:11:56,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 12:11:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:56,855 INFO L225 Difference]: With dead ends: 25 [2020-07-21 12:11:56,855 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 12:11:56,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:11:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 12:11:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 12:11:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:11:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 12:11:56,864 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 12:11:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:56,865 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 12:11:56,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:11:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 12:11:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 12:11:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:56,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:57,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:57,068 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 12:11:57,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:57,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023914235] [2020-07-21 12:11:57,070 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 12:11:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 12:11:57,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:11:57,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:11:57,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:12:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:12:03,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023914235] [2020-07-21 12:12:03,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:12:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 12:12:03,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973264029] [2020-07-21 12:12:03,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:12:03,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:12:03,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-21 12:12:03,511 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-21 12:12:09,768 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 12:12:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:20,020 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 12:12:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:12:20,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 12:12:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:20,022 INFO L225 Difference]: With dead ends: 32 [2020-07-21 12:12:20,022 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 12:12:20,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=23, Invalid=63, Unknown=4, NotChecked=0, Total=90 [2020-07-21 12:12:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 12:12:20,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 12:12:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 12:12:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-21 12:12:20,032 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-21 12:12:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-21 12:12:20,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:12:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-21 12:12:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 12:12:20,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:20,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:20,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:20,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 12:12:20,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:20,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097173281] [2020-07-21 12:12:20,253 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 12:12:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 12:12:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:26,594 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 12:12:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:12:26,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:12:26,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:12:40,046 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 12:12:40,768 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:12:40,870 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:12:40,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:12:42,924 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 12:12:42,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:12:42,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:12:45,620 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 12:12:45,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:12:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-21 12:12:45,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097173281] [2020-07-21 12:12:45,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:12:45,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-21 12:12:45,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71737009] [2020-07-21 12:12:45,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 12:12:45,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 12:12:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-21 12:12:45,659 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-07-21 12:13:07,477 WARN L193 SmtUtils]: Spent 15.48 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 12:13:18,102 WARN L193 SmtUtils]: Spent 5.66 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 12:13:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:35,316 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-21 12:13:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:13:35,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-21 12:13:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:35,320 INFO L225 Difference]: With dead ends: 39 [2020-07-21 12:13:35,320 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 12:13:35,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-21 12:13:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 12:13:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 12:13:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 12:13:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-21 12:13:35,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-21 12:13:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:35,333 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-21 12:13:35,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 12:13:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-21 12:13:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 12:13:35,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:35,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:35,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:35,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:35,538 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-21 12:13:35,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:35,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926202090] [2020-07-21 12:13:35,540 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 12:13:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 12:13:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:42,039 WARN L193 SmtUtils]: Spent 4.28 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 12:13:49,378 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 12:13:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 12:13:49,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:13:49,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:13,610 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 12:14:14,119 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:14:14,122 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:14:14,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:16,155 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 12:14:16,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:14:16,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:14:20,301 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 12:14:21,063 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:14:21,965 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:14:21,969 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:14:21,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:24,313 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 12:14:24,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 12:14:24,328 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 12:14:26,434 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 12:14:32,623 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (forall ((v_main_~z~0_BEFORE_CALL_12 Int) (v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (let ((.cse3 (* v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15)) (.cse1 (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) v_main_~x~0_BEFORE_CALL_15)) (.cse0 (+ .cse3 1))) (or (= .cse0 .cse1) (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse2) (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (not (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse3) (+ .cse2 v_main_~z~0_BEFORE_CALL_12))) (= .cse1 .cse0)))))) is different from true [2020-07-21 12:14:42,944 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (= 0 c___VERIFIER_assert_~cond) (forall ((v_main_~z~0_BEFORE_CALL_12 Int) (v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (let ((.cse3 (* v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15)) (.cse1 (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) v_main_~x~0_BEFORE_CALL_15)) (.cse0 (+ .cse3 1))) (or (= .cse0 .cse1) (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse2) (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (not (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse3) (+ .cse2 v_main_~z~0_BEFORE_CALL_12))) (= .cse1 .cse0)))))) is different from true [2020-07-21 12:14:45,004 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (not (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) .cse1))) (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) .cse1) (+ (* c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from false [2020-07-21 12:14:47,065 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (not (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) .cse1))) (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) .cse1) (+ (* c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 12:14:47,092 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-21 12:14:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 19 not checked. [2020-07-21 12:14:47,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926202090] [2020-07-21 12:14:47,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:14:47,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2020-07-21 12:14:47,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317070902] [2020-07-21 12:14:47,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 12:14:47,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:14:47,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 12:14:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=167, Unknown=18, NotChecked=186, Total=420 [2020-07-21 12:14:47,120 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 21 states. [2020-07-21 12:14:53,950 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~x~0 c_main_~z~0))) (let ((.cse0 (= (+ .cse2 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0)))) (and (= c_main_~x~0 (+ c_main_~z~0 1)) .cse0 (let ((.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse1) (+ .cse2 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not .cse0))) (= c_main_~z~0 c_main_~y~0)))) is different from false [2020-07-21 12:15:43,821 WARN L193 SmtUtils]: Spent 25.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 12:15:47,865 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~z~0 c_main_~z~0))) (and (= (+ c_main_~z~0 .cse0 1) c_main_~x~0) (let ((.cse1 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) (= c_main_~y~0 .cse0))) is different from false [2020-07-21 12:15:55,377 WARN L193 SmtUtils]: Spent 6.42 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 12:16:09,449 WARN L193 SmtUtils]: Spent 4.93 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 12:16:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:16:29,380 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-21 12:16:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:16:29,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-07-21 12:16:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:16:29,446 INFO L225 Difference]: With dead ends: 44 [2020-07-21 12:16:29,446 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 12:16:29,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 124.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=32, NotChecked=344, Total=756 [2020-07-21 12:16:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 12:16:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-21 12:16:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 12:16:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-21 12:16:29,456 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-07-21 12:16:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:16:29,456 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-21 12:16:29,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 12:16:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-21 12:16:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 12:16:29,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:16:29,458 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:16:29,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:16:29,661 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:16:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:16:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-21 12:16:29,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:16:29,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663068875] [2020-07-21 12:16:29,664 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 12:16:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:16:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 12:16:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:16:30,583 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 12:16:41,964 WARN L193 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2020-07-21 12:16:43,368 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:17:14,513 WARN L193 SmtUtils]: Spent 10.29 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 12:17:14,515 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:17:22,662 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~x~0_29 Int) (v_main_~z~0_BEFORE_CALL_17 Int)) (let ((.cse0 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17))) (and (not (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)))) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_29) (+ .cse0 1))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-21 12:17:24,728 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:17:32,892 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_29 Int) (v_main_~z~0_BEFORE_CALL_17 Int)) (let ((.cse0 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17))) (and (not (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)))) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_29) (+ .cse0 1))))) is different from false [2020-07-21 12:17:34,907 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_29 Int) (v_main_~z~0_BEFORE_CALL_17 Int)) (let ((.cse0 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17))) (and (not (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)))) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_29) (+ .cse0 1))))) is different from true [2020-07-21 12:17:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 25 refuted. 1 times theorem prover too weak. 12 trivial. 2 not checked. [2020-07-21 12:17:34,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:17:38,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:18:01,192 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:18:02,636 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:18:02,638 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:18:02,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:18:04,684 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 12:18:04,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:18:04,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:18:10,873 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 12:18:12,599 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:18:14,342 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 12:18:14,344 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:18:14,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:18:16,423 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse1 (* main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse0 (* main_~x~0 c_main_~z~0))) (or (not (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse1))) (= (+ (* c_main_~z~0 c_main_~z~0) (* main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) main_~x~0)))))) is different from true [2020-07-21 12:18:16,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663068875] [2020-07-21 12:18:16,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:18:16,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-21 12:18:16,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342897002] [2020-07-21 12:18:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:18:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:16,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:18:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=220, Unknown=22, NotChecked=170, Total=462 [2020-07-21 12:18:16,426 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2020-07-21 12:18:50,554 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~x~0_29 Int) (v_main_~z~0_BEFORE_CALL_17 Int)) (let ((.cse1 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17))) (and (not (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 (* v_main_~x~0_29 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)))) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_29) (+ .cse1 1))))))) (and (or (and .cse0 (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (or (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2020-07-21 12:19:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:01,606 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-21 12:19:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 12:19:01,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-07-21 12:19:01,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:01,609 INFO L225 Difference]: With dead ends: 51 [2020-07-21 12:19:01,609 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 12:19:01,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.6s TimeCoverageRelationStatistics Valid=57, Invalid=250, Unknown=23, NotChecked=222, Total=552 [2020-07-21 12:19:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 12:19:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-21 12:19:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 12:19:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-07-21 12:19:01,619 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2020-07-21 12:19:01,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:01,620 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-07-21 12:19:01,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:19:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-07-21 12:19:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 12:19:01,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:01,621 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:19:01,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:01,824 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-21 12:19:01,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:01,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848744641] [2020-07-21 12:19:01,827 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