/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_FUNCTIONS --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/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:53:22,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:53:22,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:53:22,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:53:22,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:53:22,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:53:23,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:53:23,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:53:23,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:53:23,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:53:23,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:53:23,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:53:23,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:53:23,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:53:23,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:53:23,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:53:23,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:53:23,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:53:23,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:53:23,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:53:23,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:53:23,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:53:23,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:53:23,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:53:23,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 14:53:23,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 14:53:23,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 14:53:23,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 14:53:23,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 14:53:23,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 14:53:23,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 14:53:23,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 14:53:23,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 14:53:23,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 14:53:23,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 14:53:23,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 14:53:23,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 14:53:23,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 14:53:23,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:53:23,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:53:23,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:53:23,034 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 14:53:23,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:53:23,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:53:23,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:53:23,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:53:23,063 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:53:23,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:53:23,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:53:23,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:53:23,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:53:23,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:53:23,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:53:23,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:53:23,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:53:23,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:53:23,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:53:23,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:53:23,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:53:23,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:53:23,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:53:23,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:53:23,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:53:23,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:53:23,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:53:23,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:53:23,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:53:23,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:53:23,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:23,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:53:23,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:53:23,070 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_FUNCTIONS 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 14:53:23,440 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:53:23,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:53:23,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:53:23,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:53:23,461 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:53:23,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 14:53:23,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61266807/2ad06e94a61b480ab2bb887c0cbb0e39/FLAGcac32a049 [2020-07-20 14:53:24,049 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:53:24,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 14:53:24,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61266807/2ad06e94a61b480ab2bb887c0cbb0e39/FLAGcac32a049 [2020-07-20 14:53:24,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a61266807/2ad06e94a61b480ab2bb887c0cbb0e39 [2020-07-20 14:53:24,474 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:53:24,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:53:24,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:53:24,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:53:24,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:53:24,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ceb4b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24, skipping insertion in model container [2020-07-20 14:53:24,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,495 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:53:24,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:53:24,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:53:24,733 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:53:24,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:53:24,768 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:53:24,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24 WrapperNode [2020-07-20 14:53:24,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:53:24,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:53:24,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:53:24,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:53:24,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (1/1) ... [2020-07-20 14:53:24,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:53:24,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:53:24,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:53:24,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:53:24,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (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 14:53:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:53:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:53:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 14:53:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:53:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:53:24,963 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:53:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:53:24,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:53:25,150 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:53:25,150 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:53:25,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:53:25 BoogieIcfgContainer [2020-07-20 14:53:25,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:53:25,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:53:25,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:53:25,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:53:25,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:53:24" (1/3) ... [2020-07-20 14:53:25,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4f9cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:53:25, skipping insertion in model container [2020-07-20 14:53:25,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:53:24" (2/3) ... [2020-07-20 14:53:25,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4f9cc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:53:25, skipping insertion in model container [2020-07-20 14:53:25,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:53:25" (3/3) ... [2020-07-20 14:53:25,164 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-20 14:53:25,175 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:53:25,184 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:53:25,200 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:53:25,235 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:53:25,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:53:25,236 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:53:25,236 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:53:25,236 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:53:25,236 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:53:25,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:53:25,237 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:53:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 14:53:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:53:25,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:25,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:25,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 14:53:25,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:25,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236198182] [2020-07-20 14:53:25,299 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 14:53:25,376 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:53:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 14:53:25,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:25,408 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 14:53:25,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:53:25,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236198182] [2020-07-20 14:53:25,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:53:25,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 14:53:25,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474829684] [2020-07-20 14:53:25,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 14:53:25,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:53:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 14:53:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 14:53:25,438 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 14:53:25,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:53:25,474 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 14:53:25,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 14:53:25,476 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 14:53:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:53:25,495 INFO L225 Difference]: With dead ends: 35 [2020-07-20 14:53:25,495 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 14:53:25,502 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 14:53:25,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 14:53:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 14:53:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 14:53:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 14:53:25,547 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 14:53:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:53:25,547 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 14:53:25,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 14:53:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 14:53:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:53:25,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:25,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:25,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:25,763 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 14:53:25,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:25,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278668446] [2020-07-20 14:53:25,766 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 14:53:25,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 14:53:25,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 14:53:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:25,891 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 14:53:25,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:53:25,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278668446] [2020-07-20 14:53:25,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:53:25,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 14:53:25,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794827322] [2020-07-20 14:53:25,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 14:53:25,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:53:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 14:53:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 14:53:25,896 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 14:53:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:53:25,985 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 14:53:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 14:53:25,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 14:53:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:53:25,987 INFO L225 Difference]: With dead ends: 25 [2020-07-20 14:53:25,987 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 14:53:25,988 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 14:53:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 14:53:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 14:53:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 14:53:25,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 14:53:25,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 14:53:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:53:25,997 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 14:53:25,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 14:53:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 14:53:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 14:53:25,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:25,998 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:26,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:26,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 14:53:26,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:26,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490180457] [2020-07-20 14:53:26,215 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 14:53:26,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:53:26,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:26,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 14:53:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:53:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:53:26,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:53:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:53:30,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490180457] [2020-07-20 14:53:30,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:53:30,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 14:53:30,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113504484] [2020-07-20 14:53:30,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 14:53:30,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:53:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 14:53:30,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2020-07-20 14:53:30,585 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-20 14:53:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:53:44,962 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 14:53:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:53:44,963 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 14:53:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:53:44,964 INFO L225 Difference]: With dead ends: 32 [2020-07-20 14:53:44,965 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 14:53:44,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2020-07-20 14:53:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 14:53:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-20 14:53:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 14:53:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-20 14:53:44,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-20 14:53:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:53:44,974 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-20 14:53:44,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 14:53:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-20 14:53:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 14:53:44,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:44,976 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:45,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:45,182 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:45,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:45,183 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-20 14:53:45,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:45,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968486728] [2020-07-20 14:53:45,185 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 14:53:45,222 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:53:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:45,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 14:53:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:45,395 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 14:53:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 14:53:45,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:53:45,805 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 14:53:45,812 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 14:53:45,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:53:45,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:53:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 14:53:45,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968486728] [2020-07-20 14:53:45,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:53:45,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-20 14:53:45,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757134852] [2020-07-20 14:53:45,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 14:53:45,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:53:45,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 14:53:45,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 14:53:45,898 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-20 14:53:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:53:48,516 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 14:53:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 14:53:48,517 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-20 14:53:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:53:48,520 INFO L225 Difference]: With dead ends: 34 [2020-07-20 14:53:48,521 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 14:53:48,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 14:53:48,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 14:53:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 14:53:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 14:53:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 14:53:48,529 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-20 14:53:48,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:53:48,529 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 14:53:48,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 14:53:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 14:53:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 14:53:48,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:53:48,531 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:53:48,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:48,743 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:53:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:53:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 14:53:48,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:53:48,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533311801] [2020-07-20 14:53:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:53:48,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:53:48,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:53:48,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 14:53:48,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:53:55,361 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 14:53:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 14:53:55,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:53:55,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:54:08,069 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 14:54:08,082 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 14:54:08,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:54:10,117 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 [2020-07-20 14:54:10,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:54:10,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:54:12,427 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 [2020-07-20 14:54:12,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 14:54:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-20 14:54:12,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533311801] [2020-07-20 14:54:12,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:54:12,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 14:54:12,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728573792] [2020-07-20 14:54:12,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 14:54:12,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:54:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 14:54:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-20 14:54:12,461 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-20 14:54:33,585 WARN L193 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 14:54:41,088 WARN L193 SmtUtils]: Spent 2.95 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 14:54:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:54:55,098 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-20 14:54:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 14:54:55,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-20 14:54:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:54:55,153 INFO L225 Difference]: With dead ends: 37 [2020-07-20 14:54:55,153 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 14:54:55,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-20 14:54:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 14:54:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 14:54:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 14:54:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 14:54:55,162 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 14:54:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:54:55,163 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 14:54:55,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 14:54:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 14:54:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 14:54:55,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:54:55,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:54:55,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:54:55,369 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:54:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:54:55,370 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 14:54:55,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:54:55,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479776965] [2020-07-20 14:54:55,370 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 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