/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:46:11,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:46:11,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:46:11,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:46:11,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:46:11,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:46:11,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:46:11,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:46:11,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:46:11,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:46:11,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:46:11,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:46:11,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:46:11,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:46:11,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:46:11,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:46:11,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:46:11,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:46:11,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:46:11,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:46:11,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:46:11,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:46:11,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:46:11,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:46:11,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:46:11,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:46:11,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:46:11,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:46:11,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:46:11,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:46:11,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:46:11,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:46:11,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:46:11,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:46:11,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:46:11,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:46:11,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:46:11,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:46:11,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:46:11,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:46:11,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:46:11,397 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:46:11,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:46:11,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:46:11,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:46:11,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:46:11,422 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:46:11,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:46:11,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:46:11,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:46:11,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:46:11,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:46:11,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:46:11,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:46:11,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:46:11,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:46:11,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:46:11,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:46:11,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:46:11,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:46:11,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:46:11,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:46:11,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:46:11,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:46:11,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:46:11,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:46:11,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:46:11,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:46:11,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:46:11,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:46:11,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:46:11,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:46:11,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:46:11,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:46:11,901 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:46:11,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:46:11,905 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:46:11,907 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2f.c [2020-07-20 01:46:12,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a46efe6c/7c300ed1fe7842f58a2df7ba19351185/FLAG2172b7bfd [2020-07-20 01:46:12,783 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:46:12,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2f.c [2020-07-20 01:46:12,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a46efe6c/7c300ed1fe7842f58a2df7ba19351185/FLAG2172b7bfd [2020-07-20 01:46:12,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a46efe6c/7c300ed1fe7842f58a2df7ba19351185 [2020-07-20 01:46:12,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:46:12,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:46:12,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:46:12,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:46:13,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:46:13,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:12" (1/1) ... [2020-07-20 01:46:13,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be834b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13, skipping insertion in model container [2020-07-20 01:46:13,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:46:12" (1/1) ... [2020-07-20 01:46:13,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:46:13,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:46:13,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:46:13,308 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:46:13,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:46:13,361 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:46:13,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13 WrapperNode [2020-07-20 01:46:13,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:46:13,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:46:13,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:46:13,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:46:13,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... [2020-07-20 01:46:13,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:46:13,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:46:13,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:46:13,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:46:13,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:46:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:46:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:46:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:46:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:46:13,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:46:13,649 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:46:13,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:46:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:46:14,134 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:46:14,134 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:46:14,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:14 BoogieIcfgContainer [2020-07-20 01:46:14,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:46:14,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:46:14,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:46:14,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:46:14,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:46:12" (1/3) ... [2020-07-20 01:46:14,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b147ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:14, skipping insertion in model container [2020-07-20 01:46:14,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:46:13" (2/3) ... [2020-07-20 01:46:14,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b147ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:46:14, skipping insertion in model container [2020-07-20 01:46:14,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:46:14" (3/3) ... [2020-07-20 01:46:14,153 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-07-20 01:46:14,167 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:46:14,182 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:46:14,206 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:46:14,238 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:46:14,239 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:46:14,239 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:46:14,239 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:46:14,239 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:46:14,239 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:46:14,240 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:46:14,240 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:46:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-20 01:46:14,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:46:14,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:14,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:14,286 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:14,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-20 01:46:14,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:14,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911460419] [2020-07-20 01:46:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:14,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911460419] [2020-07-20 01:46:14,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:14,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:46:14,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441485083] [2020-07-20 01:46:14,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:46:14,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:46:14,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:46:14,623 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-07-20 01:46:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:14,823 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-20 01:46:14,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:46:14,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-20 01:46:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:14,843 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:46:14,844 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 01:46:14,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:46:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 01:46:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 01:46:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 01:46:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-20 01:46:14,909 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-20 01:46:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:14,910 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-20 01:46:14,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:46:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-20 01:46:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:46:14,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:14,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:14,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:46:14,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-20 01:46:14,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:14,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653468610] [2020-07-20 01:46:14,915 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:14,946 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:14,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729865182] [2020-07-20 01:46:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b7ff80e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:15,106 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7b7ff80e issued 4 check-sat command(s) [2020-07-20 01:46:15,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:46:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:15,267 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:15,270 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-07-20 01:46:15,272 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:15,315 INFO L624 ElimStorePlain]: treesize reduction 16, result has 61.9 percent of original size [2020-07-20 01:46:15,320 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:15,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:11 [2020-07-20 01:46:15,414 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:15,416 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-20 01:46:15,419 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-20 01:46:15,441 INFO L624 ElimStorePlain]: treesize reduction 12, result has 36.8 percent of original size [2020-07-20 01:46:15,442 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:15,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:7 [2020-07-20 01:46:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:15,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653468610] [2020-07-20 01:46:15,505 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:15,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729865182] [2020-07-20 01:46:15,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:15,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 01:46:15,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574167029] [2020-07-20 01:46:15,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:46:15,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:46:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:46:15,511 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-07-20 01:46:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:15,876 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-07-20 01:46:15,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:46:15,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-07-20 01:46:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:15,880 INFO L225 Difference]: With dead ends: 48 [2020-07-20 01:46:15,880 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:46:15,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:46:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:46:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-07-20 01:46:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:46:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-07-20 01:46:15,902 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-07-20 01:46:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:15,902 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-07-20 01:46:15,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:46:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-07-20 01:46:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:46:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:15,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:16,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:46:16,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-07-20 01:46:16,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:16,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233270428] [2020-07-20 01:46:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:16,208 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:16,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985192035] [2020-07-20 01:46:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9b50230 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:16,326 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@9b50230 issued 4 check-sat command(s) [2020-07-20 01:46:16,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:16,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:46:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:16,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233270428] [2020-07-20 01:46:16,396 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:16,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985192035] [2020-07-20 01:46:16,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:16,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:46:16,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171714666] [2020-07-20 01:46:16,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:46:16,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:16,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:46:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:46:16,405 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-07-20 01:46:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:16,638 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-07-20 01:46:16,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:46:16,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 01:46:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:16,645 INFO L225 Difference]: With dead ends: 71 [2020-07-20 01:46:16,646 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 01:46:16,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:46:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 01:46:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-07-20 01:46:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:46:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-07-20 01:46:16,669 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-07-20 01:46:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:16,670 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-07-20 01:46:16,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:46:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-07-20 01:46:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:46:16,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:16,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:16,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:16,890 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-07-20 01:46:16,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:16,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878405751] [2020-07-20 01:46:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:16,960 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:16,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657523586] [2020-07-20 01:46:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@269dc2fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:17,079 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@269dc2fe issued 4 check-sat command(s) [2020-07-20 01:46:17,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:17,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 01:46:17,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:17,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878405751] [2020-07-20 01:46:17,135 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:17,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657523586] [2020-07-20 01:46:17,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:17,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-20 01:46:17,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489158805] [2020-07-20 01:46:17,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:46:17,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:17,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:46:17,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:46:17,139 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-07-20 01:46:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:17,302 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-07-20 01:46:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:46:17,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-20 01:46:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:17,306 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:46:17,306 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 01:46:17,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:46:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 01:46:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-07-20 01:46:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:46:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-07-20 01:46:17,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-07-20 01:46:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:17,321 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-07-20 01:46:17,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:46:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-07-20 01:46:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 01:46:17,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:17,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:17,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:17,538 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:17,539 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-07-20 01:46:17,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:17,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711362969] [2020-07-20 01:46:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:17,569 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:17,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163152869] [2020-07-20 01:46:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b476b89 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:17,678 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b476b89 issued 4 check-sat command(s) [2020-07-20 01:46:17,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 01:46:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:17,720 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 01:46:17,723 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:17,741 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:17,756 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 01:46:17,757 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:17,797 INFO L624 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2020-07-20 01:46:17,799 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:17,800 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2020-07-20 01:46:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:17,888 INFO L350 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-07-20 01:46:17,890 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2020-07-20 01:46:17,895 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:17,961 INFO L624 ElimStorePlain]: treesize reduction 39, result has 57.6 percent of original size [2020-07-20 01:46:17,962 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:17,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:53 [2020-07-20 01:46:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:18,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:18,151 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:18,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:18,341 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 01:46:18,343 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:18,345 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 62 treesize of output 237 [2020-07-20 01:46:18,360 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:18,540 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-07-20 01:46:18,542 INFO L624 ElimStorePlain]: treesize reduction 257, result has 22.8 percent of original size [2020-07-20 01:46:18,545 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-20 01:46:18,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:76 [2020-07-20 01:46:18,656 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:18,950 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-07-20 01:46:18,969 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:19,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:19,276 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:19,282 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:19,334 INFO L350 Elim1Store]: treesize reduction 43, result has 37.7 percent of original size [2020-07-20 01:46:19,335 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 43 [2020-07-20 01:46:19,339 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:19,373 INFO L624 ElimStorePlain]: treesize reduction 14, result has 54.8 percent of original size [2020-07-20 01:46:19,375 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:19,376 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:67, output treesize:7 [2020-07-20 01:46:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:19,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711362969] [2020-07-20 01:46:19,502 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:19,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163152869] [2020-07-20 01:46:19,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:19,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 01:46:19,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025772715] [2020-07-20 01:46:19,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:46:19,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:46:19,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:46:19,506 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 13 states. [2020-07-20 01:46:20,074 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 54 [2020-07-20 01:46:20,351 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-07-20 01:46:20,705 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-07-20 01:46:20,950 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-07-20 01:46:21,146 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-07-20 01:46:23,399 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-07-20 01:46:23,626 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-07-20 01:46:24,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:24,391 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-07-20 01:46:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:46:24,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-07-20 01:46:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:24,400 INFO L225 Difference]: With dead ends: 85 [2020-07-20 01:46:24,401 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 01:46:24,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:46:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 01:46:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2020-07-20 01:46:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:46:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-07-20 01:46:24,459 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2020-07-20 01:46:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:24,460 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-07-20 01:46:24,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:46:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-07-20 01:46:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 01:46:24,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:24,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:24,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:24,679 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 2 times [2020-07-20 01:46:24,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:24,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110877011] [2020-07-20 01:46:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:24,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110877011] [2020-07-20 01:46:24,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453217067] [2020-07-20 01:46:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@102d70bb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:25,038 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@102d70bb issued 4 check-sat command(s) [2020-07-20 01:46:25,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:46:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:25,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:46:25,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2020-07-20 01:46:25,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611364614] [2020-07-20 01:46:25,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:46:25,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:46:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:46:25,118 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 11 states. [2020-07-20 01:46:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:25,725 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-07-20 01:46:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:46:25,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-07-20 01:46:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:25,727 INFO L225 Difference]: With dead ends: 88 [2020-07-20 01:46:25,728 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 01:46:25,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:46:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 01:46:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-07-20 01:46:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 01:46:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-07-20 01:46:25,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2020-07-20 01:46:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:25,749 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-07-20 01:46:25,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:46:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-07-20 01:46:25,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:25,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:25,751 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:25,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:46:25,965 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-07-20 01:46:25,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:25,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506813671] [2020-07-20 01:46:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:25,981 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:25,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564569175] [2020-07-20 01:46:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@284d6e26 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:26,034 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@284d6e26 issued 3 check-sat command(s) [2020-07-20 01:46:26,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 01:46:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506813671] [2020-07-20 01:46:26,079 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:26,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564569175] [2020-07-20 01:46:26,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:46:26,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 01:46:26,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650312921] [2020-07-20 01:46:26,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 01:46:26,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 01:46:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:46:26,082 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 6 states. [2020-07-20 01:46:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:26,254 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-07-20 01:46:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:46:26,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 01:46:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:26,257 INFO L225 Difference]: With dead ends: 74 [2020-07-20 01:46:26,257 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 01:46:26,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:46:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 01:46:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-07-20 01:46:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:46:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-07-20 01:46:26,269 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 30 [2020-07-20 01:46:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:26,269 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-07-20 01:46:26,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 01:46:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-07-20 01:46:26,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:26,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:26,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:26,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:26,477 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:26,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2074868861, now seen corresponding path program 3 times [2020-07-20 01:46:26,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:26,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158531892] [2020-07-20 01:46:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:46:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:26,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158531892] [2020-07-20 01:46:26,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647665396] [2020-07-20 01:46:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@174ee655 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:26,812 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@174ee655 issued 4 check-sat command(s) [2020-07-20 01:46:26,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:46:26,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:26,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:46:26,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 01:46:26,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803069865] [2020-07-20 01:46:26,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:46:26,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:46:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:46:26,942 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 15 states. [2020-07-20 01:46:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:27,400 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-07-20 01:46:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:46:27,402 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-20 01:46:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:27,404 INFO L225 Difference]: With dead ends: 84 [2020-07-20 01:46:27,404 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 01:46:27,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:46:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 01:46:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-07-20 01:46:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:46:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-07-20 01:46:27,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-07-20 01:46:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:27,423 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-07-20 01:46:27,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:46:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-07-20 01:46:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 01:46:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:27,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:27,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:27,642 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:27,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-07-20 01:46:27,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:27,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942754433] [2020-07-20 01:46:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:27,677 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:27,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979882380] [2020-07-20 01:46:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c09a84c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:27,785 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5c09a84c issued 4 check-sat command(s) [2020-07-20 01:46:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:27,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 01:46:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:27,814 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-20 01:46:27,817 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:27,829 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:27,843 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-07-20 01:46:27,845 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:27,862 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:27,863 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:27,864 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2020-07-20 01:46:27,969 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-07-20 01:46:27,970 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-07-20 01:46:27,973 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,016 INFO L624 ElimStorePlain]: treesize reduction 35, result has 55.7 percent of original size [2020-07-20 01:46:28,018 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2020-07-20 01:46:28,210 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-07-20 01:46:28,211 INFO L350 Elim1Store]: treesize reduction 79, result has 52.4 percent of original size [2020-07-20 01:46:28,213 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 118 [2020-07-20 01:46:28,216 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,307 INFO L624 ElimStorePlain]: treesize reduction 76, result has 42.4 percent of original size [2020-07-20 01:46:28,308 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,308 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:56 [2020-07-20 01:46:28,635 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-07-20 01:46:28,637 INFO L350 Elim1Store]: treesize reduction 86, result has 50.9 percent of original size [2020-07-20 01:46:28,638 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 76 treesize of output 153 [2020-07-20 01:46:28,641 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,772 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-07-20 01:46:28,774 INFO L624 ElimStorePlain]: treesize reduction 127, result has 39.2 percent of original size [2020-07-20 01:46:28,775 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:28,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:86, output treesize:82 [2020-07-20 01:46:28,953 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:28,959 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:28,962 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,242 INFO L244 Elim1Store]: Index analysis took 257 ms [2020-07-20 01:46:29,299 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 01:46:29,299 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 204 [2020-07-20 01:46:29,303 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:29,318 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-20 01:46:29,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-20 01:46:29,349 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 94 [2020-07-20 01:46:29,352 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:29,701 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-07-20 01:46:29,703 INFO L624 ElimStorePlain]: treesize reduction 204, result has 52.8 percent of original size [2020-07-20 01:46:29,707 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-07-20 01:46:29,708 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:225, output treesize:228 [2020-07-20 01:46:29,996 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 01:46:30,002 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:30,004 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:30,685 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-07-20 01:46:30,690 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 01:46:30,853 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 01:46:30,967 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 01:46:31,721 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2020-07-20 01:46:31,722 INFO L350 Elim1Store]: treesize reduction 102, result has 64.7 percent of original size [2020-07-20 01:46:31,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 117 treesize of output 213 [2020-07-20 01:46:31,733 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-20 01:46:31,734 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,736 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,736 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,737 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,738 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,739 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,740 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,742 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,743 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,747 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 5, 2, 4, 2, 3, 2, 2, 3, 1] term [2020-07-20 01:46:31,747 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,749 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 4, 2, 3, 2, 2, 3, 1] term [2020-07-20 01:46:31,751 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,752 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 3, 2, 2, 3, 1] term [2020-07-20 01:46:31,753 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,755 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 2, 3, 1] term [2020-07-20 01:46:31,756 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,758 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 3, 1] term [2020-07-20 01:46:31,758 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,759 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-07-20 01:46:31,760 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,760 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,761 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,763 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,763 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,764 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,764 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,764 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,767 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,768 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,771 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,772 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,772 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,773 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,773 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,774 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,775 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,776 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,779 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,780 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,781 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,784 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,785 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,787 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,787 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,790 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[12, 2, 1] term [2020-07-20 01:46:31,791 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,795 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 3, 2, 4, 2, 4, 2, 3, 3, 2, 4, 2, 3, 1] term [2020-07-20 01:46:31,795 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,800 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 3, 2, 4, 2, 4, 2, 3, 3, 2, 4, 2, 3, 1] term [2020-07-20 01:46:31,801 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,806 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 4, 2, 4, 2, 3, 3, 2, 4, 2, 3, 1] term [2020-07-20 01:46:31,807 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,809 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,809 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,811 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,814 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,815 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,818 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 4, 2, 3, 2, 2, 3, 1] term [2020-07-20 01:46:31,820 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,822 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2020-07-20 01:46:31,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 01:46:31,824 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-20 01:46:31,824 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,825 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,825 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,826 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,827 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,829 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,830 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,831 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,832 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,836 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 3, 2, 2, 3, 1] term [2020-07-20 01:46:31,837 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,839 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 2, 3, 1] term [2020-07-20 01:46:31,840 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,841 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 2, 3, 1] term [2020-07-20 01:46:31,842 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,844 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 2, 3, 1] term [2020-07-20 01:46:31,844 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,845 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 3, 1] term [2020-07-20 01:46:31,845 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,847 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-07-20 01:46:31,848 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,852 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[7, 2, 1] term [2020-07-20 01:46:31,853 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-07-20 01:46:31,854 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-07-20 01:46:31,854 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-20 01:46:31,857 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-07-20 01:46:31,858 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-20 01:46:31,859 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-07-20 01:46:31,860 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-20 01:46:31,861 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-07-20 01:46:31,862 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 01:46:31,864 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-07-20 01:46:31,864 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 01:46:31,882 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 01:46:32,623 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 15 [2020-07-20 01:46:32,624 INFO L624 ElimStorePlain]: treesize reduction 4265, result has 0.4 percent of original size [2020-07-20 01:46:32,625 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 01:46:32,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:130, output treesize:7 [2020-07-20 01:46:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:32,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942754433] [2020-07-20 01:46:32,850 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:32,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979882380] [2020-07-20 01:46:32,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:32,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-20 01:46:32,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254680454] [2020-07-20 01:46:32,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:46:32,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:32,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:46:32,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:46:32,852 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 17 states. [2020-07-20 01:46:33,645 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-07-20 01:46:33,872 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-07-20 01:46:34,393 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 56 [2020-07-20 01:46:35,510 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 90 [2020-07-20 01:46:36,289 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2020-07-20 01:46:36,878 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 69 [2020-07-20 01:46:40,218 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2020-07-20 01:46:40,692 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2020-07-20 01:46:41,506 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 79 [2020-07-20 01:46:45,999 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 55 [2020-07-20 01:46:46,955 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2020-07-20 01:46:47,934 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 71 [2020-07-20 01:46:55,054 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 81 [2020-07-20 01:46:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:55,425 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-07-20 01:46:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-20 01:46:55,428 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-07-20 01:46:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:55,429 INFO L225 Difference]: With dead ends: 98 [2020-07-20 01:46:55,430 INFO L226 Difference]: Without dead ends: 96 [2020-07-20 01:46:55,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=179, Invalid=941, Unknown=2, NotChecked=0, Total=1122 [2020-07-20 01:46:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-20 01:46:55,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-07-20 01:46:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 01:46:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-07-20 01:46:55,446 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 30 [2020-07-20 01:46:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:55,446 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-07-20 01:46:55,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:46:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-07-20 01:46:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 01:46:55,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:55,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:55,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:46:55,651 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-07-20 01:46:55,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:55,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492432502] [2020-07-20 01:46:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:55,677 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:55,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626572738] [2020-07-20 01:46:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36f945a0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:55,796 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36f945a0 issued 4 check-sat command(s) [2020-07-20 01:46:55,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:46:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:46:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:46:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:46:55,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492432502] [2020-07-20 01:46:55,880 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-20 01:46:55,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626572738] [2020-07-20 01:46:55,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:46:55,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 01:46:55,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367002934] [2020-07-20 01:46:55,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:46:55,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:46:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:46:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:46:55,882 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 9 states. [2020-07-20 01:46:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:46:56,443 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2020-07-20 01:46:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:46:56,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-07-20 01:46:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:46:56,447 INFO L225 Difference]: With dead ends: 102 [2020-07-20 01:46:56,447 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 01:46:56,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:46:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 01:46:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-07-20 01:46:56,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:46:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-07-20 01:46:56,484 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 32 [2020-07-20 01:46:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:46:56,487 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-07-20 01:46:56,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:46:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-07-20 01:46:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:46:56,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:46:56,492 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:46:56,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:56,707 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:46:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:46:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-07-20 01:46:56,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:46:56,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328293307] [2020-07-20 01:46:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6213f8f6 [2020-07-20 01:46:56,721 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:46:56,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405147693] [2020-07-20 01:46:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e5cbff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:56,807 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37e5cbff issued 4 check-sat command(s) [2020-07-20 01:46:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 01:46:56,808 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:46:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:46:56,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:46:56,861 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:46:56,862 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:46:57,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:46:57,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:46:57 BoogieIcfgContainer [2020-07-20 01:46:57,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:46:57,138 INFO L168 Benchmark]: Toolchain (without parser) took 44143.33 ms. Allocated memory was 144.2 MB in the beginning and 317.7 MB in the end (delta: 173.5 MB). Free memory was 100.7 MB in the beginning and 124.2 MB in the end (delta: -23.5 MB). Peak memory consumption was 150.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,139 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 144.2 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.38 ms. Allocated memory is still 144.2 MB. Free memory was 100.2 MB in the beginning and 89.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,140 INFO L168 Benchmark]: Boogie Preprocessor took 189.34 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.8 MB in the beginning and 179.8 MB in the end (delta: -90.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,141 INFO L168 Benchmark]: RCFGBuilder took 586.08 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,142 INFO L168 Benchmark]: TraceAbstraction took 42995.09 ms. Allocated memory was 202.4 MB in the beginning and 317.7 MB in the end (delta: 115.3 MB). Free memory was 162.3 MB in the beginning and 124.2 MB in the end (delta: 38.1 MB). Peak memory consumption was 153.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:46:57,153 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 144.2 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 364.38 ms. Allocated memory is still 144.2 MB. Free memory was 100.2 MB in the beginning and 89.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 189.34 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 89.8 MB in the beginning and 179.8 MB in the end (delta: -90.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 586.08 ms. Allocated memory is still 202.4 MB. Free memory was 179.8 MB in the beginning and 163.0 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 42995.09 ms. Allocated memory was 202.4 MB in the beginning and 317.7 MB in the end (delta: 115.3 MB). Free memory was 162.3 MB in the beginning and 124.2 MB in the end (delta: 38.1 MB). Peak memory consumption was 153.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=3, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 8 [L30] b[0] = 1 [L32] i=1 VAL [\old(N)=0, a={-1:0}, b={1:0}, i=1, malloc(sizeof(long long)*N)={1:0}, malloc(sizeof(long long)*N)={-1:0}, N=2] [L32] COND TRUE i