/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:12:37,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:12:37,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:12:37,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:12:37,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:12:37,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:12:37,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:12:37,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:12:37,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:12:37,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:12:37,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:12:37,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:12:37,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:12:37,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:12:37,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:12:37,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:12:37,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:12:37,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:12:37,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:12:37,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:12:37,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:12:37,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:12:37,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:12:37,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:12:37,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:12:37,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:12:37,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:12:37,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:12:37,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:12:37,896 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:12:37,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:12:37,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:12:37,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:12:37,898 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:12:37,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:12:37,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:12:37,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:12:37,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:12:37,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:12:37,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:12:37,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:12:37,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:12:37,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:12:37,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:12:37,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:12:37,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:12:37,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:12:37,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:12:37,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:12:37,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:12:37,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:37,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:12:37,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:12:37,903 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:12:38,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:12:38,172 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:12:38,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:12:38,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:12:38,176 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:12:38,176 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 12:12:38,255 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14ebbaf9/e53cd018d7e447eebd4d0cebbbdf9967/FLAG1b956e3b6 [2020-07-21 12:12:38,731 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:12:38,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 12:12:38,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14ebbaf9/e53cd018d7e447eebd4d0cebbbdf9967/FLAG1b956e3b6 [2020-07-21 12:12:39,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a14ebbaf9/e53cd018d7e447eebd4d0cebbbdf9967 [2020-07-21 12:12:39,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:12:39,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:12:39,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:12:39,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:12:39,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:12:39,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e6230b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39, skipping insertion in model container [2020-07-21 12:12:39,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:12:39,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:12:39,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:12:39,331 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:12:39,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:12:39,364 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:12:39,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39 WrapperNode [2020-07-21 12:12:39,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:12:39,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:12:39,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:12:39,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:12:39,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... [2020-07-21 12:12:39,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:12:39,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:12:39,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:12:39,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:12:39,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:12:39,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:12:39,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:12:39,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:12:39,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:12:39,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:12:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:12:39,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:12:39,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:12:39,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:12:39,731 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:12:39,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:12:39 BoogieIcfgContainer [2020-07-21 12:12:39,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:12:39,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:12:39,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:12:39,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:12:39,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:12:39" (1/3) ... [2020-07-21 12:12:39,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2fe8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:12:39, skipping insertion in model container [2020-07-21 12:12:39,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:12:39" (2/3) ... [2020-07-21 12:12:39,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2fe8d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:12:39, skipping insertion in model container [2020-07-21 12:12:39,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:12:39" (3/3) ... [2020-07-21 12:12:39,742 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-21 12:12:39,753 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:12:39,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:12:39,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:12:39,799 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:12:39,800 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:12:39,800 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:12:39,800 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:12:39,800 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:12:39,800 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:12:39,800 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:12:39,801 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:12:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 12:12:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:12:39,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:39,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:39,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 12:12:39,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:39,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424018069] [2020-07-21 12:12:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:12:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:12:39,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:12:39,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424018069] [2020-07-21 12:12:39,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:12:39,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:12:39,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643945860] [2020-07-21 12:12:39,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:12:39,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:12:39,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:12:39,972 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 12:12:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:39,997 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 12:12:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:12:39,999 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 12:12:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:40,009 INFO L225 Difference]: With dead ends: 35 [2020-07-21 12:12:40,010 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 12:12:40,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:12:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 12:12:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 12:12:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 12:12:40,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 12:12:40,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 12:12:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:40,058 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 12:12:40,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:12:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 12:12:40,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 12:12:40,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:40,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:40,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:40,274 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 12:12:40,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:40,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627815991] [2020-07-21 12:12:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:40,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:12:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:12:40,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:12:40,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627815991] [2020-07-21 12:12:40,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:12:40,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:12:40,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335331123] [2020-07-21 12:12:40,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:12:40,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:40,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:12:40,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:12:40,438 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 12:12:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:40,517 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 12:12:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:12:40,519 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 12:12:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:40,520 INFO L225 Difference]: With dead ends: 25 [2020-07-21 12:12:40,520 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 12:12:40,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:12:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 12:12:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 12:12:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 12:12:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 12:12:40,529 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 12:12:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:40,530 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 12:12:40,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:12:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 12:12:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 12:12:40,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:12:40,532 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:12:40,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:40,746 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:12:40,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:12:40,747 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 12:12:40,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:12:40,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853594739] [2020-07-21 12:12:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:12:40,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:12:40,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:12:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:12:40,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:12:40,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:12:48,887 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:12:48,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:12:50,959 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 [2020-07-21 12:12:50,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:12:50,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:12:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-07-21 12:12:51,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853594739] [2020-07-21 12:12:51,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:12:51,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 12:12:51,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35640588] [2020-07-21 12:12:51,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 12:12:51,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:12:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 12:12:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132 [2020-07-21 12:12:51,245 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-07-21 12:12:57,679 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 12:13:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:13:10,852 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 12:13:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 12:13:10,852 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-21 12:13:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:13:10,854 INFO L225 Difference]: With dead ends: 32 [2020-07-21 12:13:10,854 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:13:10,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210 [2020-07-21 12:13:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:13:10,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-21 12:13:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 12:13:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 12:13:10,865 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-21 12:13:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:13:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 12:13:10,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 12:13:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 12:13:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 12:13:10,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:13:10,866 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:13:11,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:11,069 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:13:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:13:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 12:13:11,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:13:11,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336405999] [2020-07-21 12:13:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:13:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:13:11,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 12:13:11,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:13:11,437 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 12:13:11,449 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:13:35,158 WARN L193 SmtUtils]: Spent 11.25 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 12:13:35,162 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:14:03,477 WARN L193 SmtUtils]: Spent 13.27 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 12:14:05,539 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:14:13,810 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from false [2020-07-21 12:14:15,839 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse0 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))) is different from true [2020-07-21 12:14:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:14:15,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:14:22,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:38,882 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 12:14:38,894 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:14:38,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:14:40,992 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0))) (or (= (+ (* c_main_~z~0 c_main_~a~0) (* main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0))) (not (= (+ .cse0 c_main_~a~0) (+ main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0))))))) is different from true [2020-07-21 12:14:40,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336405999] [2020-07-21 12:14:40,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:14:40,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 12:14:40,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233063223] [2020-07-21 12:14:40,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:14:40,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:14:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:14:40,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=143, Unknown=13, NotChecked=50, Total=240 [2020-07-21 12:14:40,996 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-07-21 12:14:58,660 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse1) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)))) (= (+ .cse1 v_main_~a~0_BEFORE_CALL_5) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_15))))))) (and (or (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) (or (and .cse0 (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2020-07-21 12:15:58,014 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-07-21 12:15:58,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:15:58,217 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:137) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:759) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:672) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:471) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297) at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141) at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229) at java.io.BufferedWriter.flush(BufferedWriter.java:254) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:120) ... 31 more [2020-07-21 12:15:58,228 INFO L168 Benchmark]: Toolchain (without parser) took 199111.05 ms. Allocated memory was 139.5 MB in the beginning and 233.3 MB in the end (delta: 93.8 MB). Free memory was 104.0 MB in the beginning and 131.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 66.8 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,229 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.12 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,233 INFO L168 Benchmark]: Boogie Preprocessor took 110.68 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.0 MB in the beginning and 181.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,234 INFO L168 Benchmark]: RCFGBuilder took 258.69 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 169.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,235 INFO L168 Benchmark]: TraceAbstraction took 198486.77 ms. Allocated memory was 203.4 MB in the beginning and 233.3 MB in the end (delta: 29.9 MB). Free memory was 168.7 MB in the beginning and 131.1 MB in the end (delta: 37.6 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:15:58,246 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.12 ms. Allocated memory is still 139.5 MB. Free memory was 103.6 MB in the beginning and 94.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.68 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 94.0 MB in the beginning and 181.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.69 ms. Allocated memory is still 203.4 MB. Free memory was 181.7 MB in the beginning and 169.4 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 198486.77 ms. Allocated memory was 203.4 MB in the beginning and 233.3 MB in the end (delta: 29.9 MB). Free memory was 168.7 MB in the beginning and 131.1 MB in the end (delta: 37.6 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:123) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...