/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:21:09,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:21:09,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:21:09,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:21:09,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:21:09,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:21:09,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:21:09,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:21:09,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:21:09,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:21:09,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:21:09,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:21:09,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:21:09,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:21:09,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:21:09,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:21:09,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:21:09,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:21:09,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:21:09,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:21:09,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:21:09,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:21:09,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:21:09,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:21:09,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:21:09,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:21:09,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:21:09,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:21:09,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:21:09,568 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:21:09,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:21:09,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:21:09,572 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:21:09,572 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:21:09,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:21:09,572 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:21:09,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:21:09,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:21:09,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:21:09,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:21:09,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:21:09,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:21:09,574 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:21:09,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:21:09,574 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:21:09,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:21:09,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:21:09,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:21:09,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:21:09,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:21:09,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:21:09,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:21:09,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:21:09,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:21:09,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:21:09,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:09,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:21:09,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:21:09,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:21:09,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:21:10,025 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:21:10,031 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:21:10,043 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:21:10,044 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:21:10,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 18:21:10,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e973d1627/5c923c455bc34b0f81ea6ddcb0c23aa5/FLAGb17305ac8 [2020-07-20 18:21:10,827 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:21:10,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 18:21:10,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e973d1627/5c923c455bc34b0f81ea6ddcb0c23aa5/FLAGb17305ac8 [2020-07-20 18:21:11,134 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e973d1627/5c923c455bc34b0f81ea6ddcb0c23aa5 [2020-07-20 18:21:11,155 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:21:11,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:21:11,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:21:11,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:21:11,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:21:11,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3932551c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11, skipping insertion in model container [2020-07-20 18:21:11,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:21:11,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:21:11,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:21:11,641 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:21:11,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:21:11,685 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:21:11,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11 WrapperNode [2020-07-20 18:21:11,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:21:11,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:21:11,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:21:11,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:21:11,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... [2020-07-20 18:21:11,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:21:11,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:21:11,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:21:11,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:21:11,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:21:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:21:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:21:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:21:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 18:21:11,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:21:11,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:21:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 18:21:11,947 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:21:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:21:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 18:21:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:21:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:21:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:21:12,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:21:12,228 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 18:21:12,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:21:12 BoogieIcfgContainer [2020-07-20 18:21:12,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:21:12,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:21:12,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:21:12,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:21:12,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:21:11" (1/3) ... [2020-07-20 18:21:12,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40379d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:21:12, skipping insertion in model container [2020-07-20 18:21:12,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:21:11" (2/3) ... [2020-07-20 18:21:12,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40379d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:21:12, skipping insertion in model container [2020-07-20 18:21:12,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:21:12" (3/3) ... [2020-07-20 18:21:12,239 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-20 18:21:12,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:21:12,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:21:12,284 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:21:12,322 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:21:12,323 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:21:12,323 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:21:12,323 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:21:12,324 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:21:12,324 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:21:12,324 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:21:12,324 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:21:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 18:21:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 18:21:12,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:12,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:12,371 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:12,382 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 18:21:12,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:12,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676114929] [2020-07-20 18:21:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:12,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:21:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 18:21:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:12,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:21:12,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:21:12,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676114929] [2020-07-20 18:21:12,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:21:12,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 18:21:12,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819894222] [2020-07-20 18:21:12,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 18:21:12,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:21:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 18:21:12,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 18:21:12,700 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 18:21:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:21:12,742 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 18:21:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 18:21:12,744 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 18:21:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:21:12,757 INFO L225 Difference]: With dead ends: 35 [2020-07-20 18:21:12,757 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 18:21:12,763 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 [2020-07-20 18:21:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 18:21:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 18:21:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 18:21:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 18:21:12,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 18:21:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:21:12,818 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 18:21:12,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 18:21:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 18:21:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 18:21:12,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:12,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:13,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:13,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:13,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 18:21:13,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:13,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218292928] [2020-07-20 18:21:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:13,078 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:21:13,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:21:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:21:13,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:21:13,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218292928] [2020-07-20 18:21:13,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:21:13,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:21:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353387577] [2020-07-20 18:21:13,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:21:13,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:21:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:21:13,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:21:13,323 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 18:21:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:21:13,441 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 18:21:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:21:13,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 18:21:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:21:13,446 INFO L225 Difference]: With dead ends: 25 [2020-07-20 18:21:13,446 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 18:21:13,449 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 [2020-07-20 18:21:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 18:21:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 18:21:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 18:21:13,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 18:21:13,461 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 18:21:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:21:13,462 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 18:21:13,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:21:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 18:21:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 18:21:13,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:13,464 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:13,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:13,680 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:13,682 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 18:21:13,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:13,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097252690] [2020-07-20 18:21:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:13,770 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:21:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:13,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 18:21:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:21:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:21:14,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:21:20,314 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 18:21:20,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:21:22,357 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_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-20 18:21:22,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 18:21:22,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 18:21:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-20 18:21:22,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097252690] [2020-07-20 18:21:22,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:21:22,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 18:21:22,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135843266] [2020-07-20 18:21:22,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 18:21:22,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:21:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 18:21:22,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132 [2020-07-20 18:21:22,709 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-07-20 18:21:29,162 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 18:21:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:21:41,866 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 18:21:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 18:21:41,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-20 18:21:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:21:41,870 INFO L225 Difference]: With dead ends: 32 [2020-07-20 18:21:41,870 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 18:21:41,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210 [2020-07-20 18:21:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 18:21:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 18:21:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 18:21:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 18:21:41,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-20 18:21:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:21:41,883 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 18:21:41,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 18:21:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 18:21:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 18:21:41,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:41,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:42,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:42,099 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 18:21:42,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:42,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950207469] [2020-07-20 18:21:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:42,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:21:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 18:21:42,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:47,467 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 18:21:48,014 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 18:21:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 18:21:48,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:21:48,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:22:04,483 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 18:22:04,916 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 18:22:04,922 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 18:22:04,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:22:06,968 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_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-20 18:22:06,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 18:22:07,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 18:22:09,414 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0))))) is different from true [2020-07-20 18:22:09,993 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 18:22:09,999 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 18:22:10,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:22:12,062 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 (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0))) (not (= (+ .cse1 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-20 18:22:12,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 18:22:12,093 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 18:22:14,138 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 18:22:20,383 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (forall ((v_main_~y~0_BEFORE_CALL_9 Int) (v_main_~z~0_BEFORE_CALL_7 Int) (v_main_~a~0_BEFORE_CALL_9 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9)) (.cse0 (* v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9))) (or (not (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse1))) (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse1) (+ (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9))) (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_9 .cse0)))))) is different from true [2020-07-20 18:22:30,625 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (forall ((v_main_~y~0_BEFORE_CALL_9 Int) (v_main_~z~0_BEFORE_CALL_7 Int) (v_main_~a~0_BEFORE_CALL_9 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9)) (.cse0 (* v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9))) (or (not (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse0) (+ (* v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse1))) (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) .cse1) (+ (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) (* v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~z~0_BEFORE_CALL_7 v_main_~x~0_BEFORE_CALL_9))) (= (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~z~0_BEFORE_CALL_7 v_main_~a~0_BEFORE_CALL_9) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_9 .cse0))))) (= 0 c___VERIFIER_assert_~cond)) is different from true [2020-07-20 18:22:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 11 not checked. [2020-07-20 18:22:30,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950207469] [2020-07-20 18:22:30,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:22:30,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2020-07-20 18:22:30,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310173899] [2020-07-20 18:22:30,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 18:22:30,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:22:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 18:22:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=123, Unknown=12, NotChecked=130, Total=306 [2020-07-20 18:22:30,653 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 18 states. [2020-07-20 18:22:52,666 WARN L193 SmtUtils]: Spent 15.25 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 18:23:03,883 WARN L193 SmtUtils]: Spent 4.97 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 18:23:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:23:21,681 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-20 18:23:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 18:23:21,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2020-07-20 18:23:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:23:21,714 INFO L225 Difference]: With dead ends: 37 [2020-07-20 18:23:21,715 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 18:23:21,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=64, Invalid=214, Unknown=14, NotChecked=170, Total=462 [2020-07-20 18:23:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 18:23:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 18:23:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 18:23:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 18:23:21,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 18:23:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:23:21,724 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 18:23:21,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 18:23:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 18:23:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 18:23:21,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:23:21,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:23:21,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:23:21,927 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:23:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:23:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 18:23:21,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:23:21,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135712832] [2020-07-20 18:23:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in