/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 17:18:16,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:18:16,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:18:16,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:18:16,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:18:16,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:18:16,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:18:16,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:18:16,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:18:16,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:18:16,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:18:16,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:18:16,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:18:16,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:18:16,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:18:16,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:18:16,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:18:16,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:18:16,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:18:16,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:18:16,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:18:16,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:18:16,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:18:16,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:18:16,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:18:16,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:18:16,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:18:16,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:18:16,094 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 17:18:16,110 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:18:16,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:18:16,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:18:16,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:18:16,112 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:18:16,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:18:16,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:18:16,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:18:16,115 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:18:16,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:18:16,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:18:16,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:18:16,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:18:16,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:18:16,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:18:16,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:18:16,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:18:16,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:18:16,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:18:16,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:18:16,117 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:18:16,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:16,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:18:16,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:18:16,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:18:16,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:18:16,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:18:16,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:18:16,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:18:16,421 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:18:16,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 17:18:16,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281fe5ae5/5d3bc7946f5c4c608e8ee2c78cd78c79/FLAG7514dda4d [2020-07-21 17:18:16,912 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:18:16,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-21 17:18:16,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281fe5ae5/5d3bc7946f5c4c608e8ee2c78cd78c79/FLAG7514dda4d [2020-07-21 17:18:17,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/281fe5ae5/5d3bc7946f5c4c608e8ee2c78cd78c79 [2020-07-21 17:18:17,324 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:18:17,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:18:17,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:18:17,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:18:17,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:18:17,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d542363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17, skipping insertion in model container [2020-07-21 17:18:17,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:18:17,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:18:17,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:18:17,512 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:18:17,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:18:17,544 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:18:17,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17 WrapperNode [2020-07-21 17:18:17,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:18:17,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:18:17,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:18:17,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:18:17,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (1/1) ... [2020-07-21 17:18:17,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:18:17,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:18:17,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:18:17,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:18:17,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (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 17:18:17,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:18:17,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:18:17,707 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:18:17,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:18:17,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:18:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:18:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:18:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:18:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:18:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:18:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:18:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:18:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:18:17,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:18:17,889 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:18:17,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:18:17 BoogieIcfgContainer [2020-07-21 17:18:17,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:18:17,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:18:17,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:18:17,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:18:17,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:18:17" (1/3) ... [2020-07-21 17:18:17,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274aff4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:18:17, skipping insertion in model container [2020-07-21 17:18:17,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:18:17" (2/3) ... [2020-07-21 17:18:17,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274aff4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:18:17, skipping insertion in model container [2020-07-21 17:18:17,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:18:17" (3/3) ... [2020-07-21 17:18:17,899 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-21 17:18:17,909 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:18:17,916 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:18:17,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:18:17,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:18:17,952 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:18:17,952 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:18:17,953 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:18:17,953 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:18:17,953 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:18:17,953 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:18:17,953 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:18:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 17:18:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:18:17,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:17,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:17,977 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:17,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:17,982 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 17:18:17,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:17,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188968554] [2020-07-21 17:18:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:18:18,079 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:18,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:18,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 17:18:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:18,119 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 17:18:18,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:18:18,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188968554] [2020-07-21 17:18:18,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:18:18,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 17:18:18,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777596228] [2020-07-21 17:18:18,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 17:18:18,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:18,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 17:18:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:18:18,145 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 17:18:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:18,166 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 17:18:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 17:18:18,168 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 17:18:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:18,176 INFO L225 Difference]: With dead ends: 35 [2020-07-21 17:18:18,176 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 17:18:18,179 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 17:18:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 17:18:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 17:18:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 17:18:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 17:18:18,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 17:18:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:18,210 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 17:18:18,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 17:18:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 17:18:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:18:18,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:18,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:18,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:18,413 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 17:18:18,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:18,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526324098] [2020-07-21 17:18:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:18:18,452 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:18,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:18:18,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:18,599 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 17:18:18,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:18:18,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526324098] [2020-07-21 17:18:18,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:18:18,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:18:18,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784044295] [2020-07-21 17:18:18,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:18:18,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:18:18,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:18:18,603 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 17:18:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:18,673 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 17:18:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:18:18,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 17:18:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:18,676 INFO L225 Difference]: With dead ends: 25 [2020-07-21 17:18:18,676 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 17:18:18,677 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 17:18:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 17:18:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 17:18:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 17:18:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 17:18:18,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 17:18:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:18,685 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 17:18:18,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:18:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 17:18:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 17:18:18,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:18,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:18,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:18,901 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 17:18:18,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:18,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183817289] [2020-07-21 17:18:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:18:18,951 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:18,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:18,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 17:18:18,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:19,067 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 17:18:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:18:19,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:25,570 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:18:25,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:27,617 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 17:18:27,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:18:27,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:18:27,890 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 17:18:27,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183817289] [2020-07-21 17:18:27,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:18:27,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 17:18:27,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634453773] [2020-07-21 17:18:27,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 17:18:27,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:27,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 17:18:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=4, NotChecked=18, Total=132 [2020-07-21 17:18:27,899 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2020-07-21 17:18:34,365 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 17:18:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:47,330 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 17:18:47,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 17:18:47,331 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-07-21 17:18:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:47,332 INFO L225 Difference]: With dead ends: 32 [2020-07-21 17:18:47,332 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 17:18:47,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=44, Invalid=137, Unknown=5, NotChecked=24, Total=210 [2020-07-21 17:18:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 17:18:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-21 17:18:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 17:18:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 17:18:47,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-21 17:18:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:47,341 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 17:18:47,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 17:18:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 17:18:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 17:18:47,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:47,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:47,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:47,543 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:47,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:47,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 17:18:47,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:47,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007572531] [2020-07-21 17:18:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 [2020-07-21 17:18:47,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:47,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:47,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 17:18:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:52,029 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 17:18:52,095 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:11,780 WARN L193 SmtUtils]: Spent 11.09 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 17:19:11,783 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:34,194 WARN L193 SmtUtils]: Spent 11.24 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 17:19:36,254 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:44,491 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_6 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse1 (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5)) (.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* 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))) (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)) (+ (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5) .cse0))))) is different from false [2020-07-21 17:19:46,506 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_6 Int) (v_main_~z~0_BEFORE_CALL_5 Int) (v_main_~x~0_15 Int)) (let ((.cse1 (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5)) (.cse0 (* v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* 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))) (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_5 v_main_~x~0_15)) (+ (* v_main_~a~0_BEFORE_CALL_6 v_main_~z~0_BEFORE_CALL_5) .cse0))))) is different from true [2020-07-21 17:19:46,510 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 17:19:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:19:51,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:19:56,864 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 17:20:10,970 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 17:20:10,981 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:20:10,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:20:13,041 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 17:20:13,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:20:13,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:20:19,095 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0)))))) is different from true [2020-07-21 17:20:19,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007572531] [2020-07-21 17:20:19,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 17:20:19,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 17:20:19,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453763038] [2020-07-21 17:20:19,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 17:20:19,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:20:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 17:20:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=168, Unknown=13, NotChecked=84, Total=306 [2020-07-21 17:20:19,105 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-07-21 17:21:29,069 WARN L193 SmtUtils]: Spent 37.39 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-07-21 17:21:43,948 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 34 DAG size of output: 6 [2020-07-21 17:21:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:21:46,246 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-21 17:21:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:21:46,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-07-21 17:21:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:21:46,250 INFO L225 Difference]: With dead ends: 37 [2020-07-21 17:21:46,250 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:21:46,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=63, Invalid=235, Unknown=20, NotChecked=102, Total=420 [2020-07-21 17:21:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:21:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 17:21:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 17:21:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-21 17:21:46,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-21 17:21:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:21:46,260 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-21 17:21:46,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 17:21:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-21 17:21:46,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 17:21:46,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:21:46,261 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:21:46,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:21:46,463 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:21:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:21:46,464 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-21 17:21:46,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:21:46,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176415368] [2020-07-21 17:21:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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