/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:14:47,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:14:47,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:14:47,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:14:47,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:14:47,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:14:47,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:14:47,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:14:47,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:14:47,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:14:47,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:14:47,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:14:47,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:14:47,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:14:47,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:14:47,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:14:47,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:14:47,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:14:47,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:14:47,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:14:47,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:14:47,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:14:47,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:14:47,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:14:47,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:14:47,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:14:47,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:14:47,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:14:47,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:14:47,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:14:47,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:14:47,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:14:47,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:14:47,865 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:14:47,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:14:47,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:14:47,866 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:14:47,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:14:47,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:14:47,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:14:47,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:14:47,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:14:47,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:14:47,867 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:14:48,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:14:48,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:14:48,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:14:48,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:14:48,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:14:48,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-08-22 23:14:48,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a696eb5d/8b3f7cac6b9f41b294f209811cb00083/FLAG8cbcb860e [2020-08-22 23:14:48,990 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:14:48,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-08-22 23:14:49,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a696eb5d/8b3f7cac6b9f41b294f209811cb00083/FLAG8cbcb860e [2020-08-22 23:14:49,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a696eb5d/8b3f7cac6b9f41b294f209811cb00083 [2020-08-22 23:14:49,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:14:49,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:14:49,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:49,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:14:49,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:14:49,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c4b0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49, skipping insertion in model container [2020-08-22 23:14:49,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:14:49,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:14:49,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:49,618 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:14:49,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:14:49,661 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:14:49,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49 WrapperNode [2020-08-22 23:14:49,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:14:49,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:14:49,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:14:49,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:14:49,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (1/1) ... [2020-08-22 23:14:49,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:14:49,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:14:49,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:14:49,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:14:49,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (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 [2020-08-22 23:14:49,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:14:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:14:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:14:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:14:49,899 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:14:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:14:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:14:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:14:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:14:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:14:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:14:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:14:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:14:50,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:14:50,192 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:14:50,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:50 BoogieIcfgContainer [2020-08-22 23:14:50,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:14:50,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:14:50,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:14:50,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:14:50,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:14:49" (1/3) ... [2020-08-22 23:14:50,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb7d528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:50, skipping insertion in model container [2020-08-22 23:14:50,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:14:49" (2/3) ... [2020-08-22 23:14:50,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb7d528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:14:50, skipping insertion in model container [2020-08-22 23:14:50,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:14:50" (3/3) ... [2020-08-22 23:14:50,216 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt3.c [2020-08-22 23:14:50,235 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:14:50,245 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:14:50,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:14:50,309 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:14:50,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:14:50,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:14:50,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:14:50,310 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:14:50,310 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:14:50,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:14:50,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:14:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 23:14:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 23:14:50,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:50,351 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] [2020-08-22 23:14:50,352 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1514708489, now seen corresponding path program 1 times [2020-08-22 23:14:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:50,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118018345] [2020-08-22 23:14:50,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:51,012 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-08-22 23:14:51,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:51,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118018345] [2020-08-22 23:14:51,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:14:51,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 23:14:51,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395182443] [2020-08-22 23:14:51,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:14:51,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:51,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:14:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:14:51,259 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 10 states. [2020-08-22 23:14:52,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:52,022 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-08-22 23:14:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:14:52,025 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-08-22 23:14:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:52,042 INFO L225 Difference]: With dead ends: 68 [2020-08-22 23:14:52,042 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 23:14:52,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:14:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 23:14:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-22 23:14:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 23:14:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 23:14:52,115 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-08-22 23:14:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:52,116 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 23:14:52,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:14:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 23:14:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 23:14:52,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:52,119 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, 1] [2020-08-22 23:14:52,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:14:52,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash 993233083, now seen corresponding path program 1 times [2020-08-22 23:14:52,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:52,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300161030] [2020-08-22 23:14:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:52,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:52,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300161030] [2020-08-22 23:14:52,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:52,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:14:52,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680561664] [2020-08-22 23:14:52,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:14:52,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:14:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:14:52,929 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-08-22 23:14:53,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:53,765 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-08-22 23:14:53,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:14:53,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-08-22 23:14:53,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:53,768 INFO L225 Difference]: With dead ends: 45 [2020-08-22 23:14:53,768 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 23:14:53,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:14:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 23:14:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-08-22 23:14:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 23:14:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-08-22 23:14:53,785 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 27 [2020-08-22 23:14:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:53,785 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-08-22 23:14:53,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:14:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-08-22 23:14:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 23:14:53,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:53,787 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, 1] [2020-08-22 23:14:53,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:14:53,788 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2107258259, now seen corresponding path program 2 times [2020-08-22 23:14:53,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:53,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774154867] [2020-08-22 23:14:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:54,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:54,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774154867] [2020-08-22 23:14:54,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:54,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:14:54,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217853002] [2020-08-22 23:14:54,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:14:54,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:54,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:14:54,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:14:54,053 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 9 states. [2020-08-22 23:14:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:56,466 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-08-22 23:14:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:14:56,467 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-22 23:14:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:56,469 INFO L225 Difference]: With dead ends: 49 [2020-08-22 23:14:56,469 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 23:14:56,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:14:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 23:14:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-08-22 23:14:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 23:14:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 23:14:56,483 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-08-22 23:14:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:56,484 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 23:14:56,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:14:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 23:14:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 23:14:56,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:56,486 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, 1, 1, 1, 1] [2020-08-22 23:14:56,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:14:56,486 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1595204474, now seen corresponding path program 1 times [2020-08-22 23:14:56,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:56,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698875714] [2020-08-22 23:14:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:56,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:56,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698875714] [2020-08-22 23:14:56,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:56,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 23:14:56,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255970698] [2020-08-22 23:14:56,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:14:56,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:56,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:14:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:14:56,587 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-08-22 23:14:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:56,734 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-08-22 23:14:56,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:14:56,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-08-22 23:14:56,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:56,736 INFO L225 Difference]: With dead ends: 51 [2020-08-22 23:14:56,736 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 23:14:56,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:14:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 23:14:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 23:14:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:14:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-08-22 23:14:56,753 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2020-08-22 23:14:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:56,756 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-08-22 23:14:56,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:14:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-08-22 23:14:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 23:14:56,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:56,761 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, 1, 1, 1, 1] [2020-08-22 23:14:56,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:14:56,762 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:56,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2000770278, now seen corresponding path program 1 times [2020-08-22 23:14:56,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:56,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165590008] [2020-08-22 23:14:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:57,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:14:57,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165590008] [2020-08-22 23:14:57,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:57,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:14:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279388290] [2020-08-22 23:14:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:14:57,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:14:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:14:57,830 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 17 states. [2020-08-22 23:14:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:58,897 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-08-22 23:14:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:14:58,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-08-22 23:14:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:58,899 INFO L225 Difference]: With dead ends: 50 [2020-08-22 23:14:58,900 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 23:14:58,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:14:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 23:14:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-08-22 23:14:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 23:14:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-08-22 23:14:58,927 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-08-22 23:14:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:58,931 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-08-22 23:14:58,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:14:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-08-22 23:14:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 23:14:58,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:58,933 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, 1, 1, 1, 1] [2020-08-22 23:14:58,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:14:58,934 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:58,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:58,935 INFO L82 PathProgramCache]: Analyzing trace with hash 755730712, now seen corresponding path program 2 times [2020-08-22 23:14:58,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:58,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26071212] [2020-08-22 23:14:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:03,469 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-08-22 23:15:03,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:03,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26071212] [2020-08-22 23:15:03,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:03,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:15:03,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432503881] [2020-08-22 23:15:03,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:15:03,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:15:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:15:03,544 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-08-22 23:15:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:06,417 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-08-22 23:15:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:15:06,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-08-22 23:15:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:06,421 INFO L225 Difference]: With dead ends: 57 [2020-08-22 23:15:06,421 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 23:15:06,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:15:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 23:15:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-08-22 23:15:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 23:15:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-22 23:15:06,437 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-08-22 23:15:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:06,437 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-22 23:15:06,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:15:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-22 23:15:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 23:15:06,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:06,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2020-08-22 23:15:06,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:15:06,439 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1258107707, now seen corresponding path program 1 times [2020-08-22 23:15:06,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:06,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707355317] [2020-08-22 23:15:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:07,164 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-08-22 23:15:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:07,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707355317] [2020-08-22 23:15:07,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:07,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:15:07,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287085294] [2020-08-22 23:15:07,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:15:07,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:15:07,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:15:07,478 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2020-08-22 23:15:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:08,678 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-08-22 23:15:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:15:08,679 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-08-22 23:15:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:08,680 INFO L225 Difference]: With dead ends: 65 [2020-08-22 23:15:08,680 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 23:15:08,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:15:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 23:15:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-08-22 23:15:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 23:15:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-22 23:15:08,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 37 [2020-08-22 23:15:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:08,698 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-22 23:15:08,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:15:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-22 23:15:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 23:15:08,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:08,700 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-22 23:15:08,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:15:08,700 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash -397003539, now seen corresponding path program 2 times [2020-08-22 23:15:08,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:08,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502415976] [2020-08-22 23:15:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:09,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502415976] [2020-08-22 23:15:09,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:09,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 23:15:09,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656387654] [2020-08-22 23:15:09,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:15:09,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:15:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:15:09,809 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-22 23:15:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:11,171 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 23:15:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 23:15:11,172 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-08-22 23:15:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:11,174 INFO L225 Difference]: With dead ends: 69 [2020-08-22 23:15:11,174 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 23:15:11,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:15:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 23:15:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-08-22 23:15:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 23:15:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-08-22 23:15:11,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 41 [2020-08-22 23:15:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:11,207 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-08-22 23:15:11,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 23:15:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-08-22 23:15:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 23:15:11,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:11,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2020-08-22 23:15:11,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:15:11,208 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1225985439, now seen corresponding path program 3 times [2020-08-22 23:15:11,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:11,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636389546] [2020-08-22 23:15:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:11,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:11,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636389546] [2020-08-22 23:15:11,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:11,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:15:11,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607885511] [2020-08-22 23:15:11,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:15:11,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:15:11,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:15:11,909 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 13 states. [2020-08-22 23:15:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:12,966 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2020-08-22 23:15:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:15:12,967 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-08-22 23:15:12,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:12,968 INFO L225 Difference]: With dead ends: 66 [2020-08-22 23:15:12,969 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 23:15:12,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:15:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 23:15:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-08-22 23:15:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 23:15:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-08-22 23:15:13,004 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 45 [2020-08-22 23:15:13,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:13,007 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-08-22 23:15:13,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:15:13,008 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-08-22 23:15:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 23:15:13,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:13,020 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 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, 1, 1, 1] [2020-08-22 23:15:13,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:15:13,020 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:13,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1343864940, now seen corresponding path program 4 times [2020-08-22 23:15:13,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:13,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064203494] [2020-08-22 23:15:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:14,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064203494] [2020-08-22 23:15:14,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:14,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 23:15:14,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890289136] [2020-08-22 23:15:14,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 23:15:14,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:14,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 23:15:14,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:15:14,520 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2020-08-22 23:15:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:16,520 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-08-22 23:15:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 23:15:16,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-08-22 23:15:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:16,523 INFO L225 Difference]: With dead ends: 74 [2020-08-22 23:15:16,523 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:15:16,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=218, Invalid=1422, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:15:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:15:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-08-22 23:15:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 23:15:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-22 23:15:16,544 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2020-08-22 23:15:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:16,545 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-22 23:15:16,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 23:15:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-22 23:15:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 23:15:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:16,546 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 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, 1, 1, 1] [2020-08-22 23:15:16,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:15:16,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1589603526, now seen corresponding path program 5 times [2020-08-22 23:15:16,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:16,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689214717] [2020-08-22 23:15:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:21,283 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-08-22 23:15:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:21,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689214717] [2020-08-22 23:15:21,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:21,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:15:21,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660502863] [2020-08-22 23:15:21,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:15:21,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:21,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:15:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:15:21,393 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 12 states. [2020-08-22 23:15:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:22,651 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-08-22 23:15:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:15:22,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-08-22 23:15:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:22,655 INFO L225 Difference]: With dead ends: 71 [2020-08-22 23:15:22,655 INFO L226 Difference]: Without dead ends: 59 [2020-08-22 23:15:22,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:15:22,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-22 23:15:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-08-22 23:15:22,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 23:15:22,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-08-22 23:15:22,689 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2020-08-22 23:15:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:22,691 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-08-22 23:15:22,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:15:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-08-22 23:15:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:15:22,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:22,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 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, 1, 1, 1] [2020-08-22 23:15:22,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:15:22,694 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:22,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1338361165, now seen corresponding path program 6 times [2020-08-22 23:15:22,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:22,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343588252] [2020-08-22 23:15:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:22,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343588252] [2020-08-22 23:15:22,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:22,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:15:22,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689326347] [2020-08-22 23:15:22,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:15:22,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:22,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:15:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:15:22,905 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 9 states. [2020-08-22 23:15:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:23,329 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-08-22 23:15:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:15:23,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-08-22 23:15:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:23,331 INFO L225 Difference]: With dead ends: 70 [2020-08-22 23:15:23,332 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 23:15:23,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:15:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 23:15:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-08-22 23:15:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 23:15:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-08-22 23:15:23,353 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-08-22 23:15:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:23,354 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-08-22 23:15:23,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:15:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-08-22 23:15:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 23:15:23,354 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:23,355 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 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, 1] [2020-08-22 23:15:23,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:15:23,355 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 639368621, now seen corresponding path program 7 times [2020-08-22 23:15:23,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:23,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119615852] [2020-08-22 23:15:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:24,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:24,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119615852] [2020-08-22 23:15:24,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:24,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 23:15:24,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791111975] [2020-08-22 23:15:24,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 23:15:24,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 23:15:24,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:15:24,923 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 25 states. [2020-08-22 23:15:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:27,012 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-08-22 23:15:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 23:15:27,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-08-22 23:15:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:27,013 INFO L225 Difference]: With dead ends: 69 [2020-08-22 23:15:27,013 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 23:15:27,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:15:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 23:15:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-08-22 23:15:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 23:15:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-08-22 23:15:27,033 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2020-08-22 23:15:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:27,034 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-08-22 23:15:27,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 23:15:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-08-22 23:15:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 23:15:27,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:27,035 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 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, 1] [2020-08-22 23:15:27,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:15:27,035 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:27,036 INFO L82 PathProgramCache]: Analyzing trace with hash 692483679, now seen corresponding path program 8 times [2020-08-22 23:15:27,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:27,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127741651] [2020-08-22 23:15:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:28,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127741651] [2020-08-22 23:15:28,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:28,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 23:15:28,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617800467] [2020-08-22 23:15:28,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 23:15:28,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:28,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 23:15:28,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:15:28,796 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 27 states. [2020-08-22 23:15:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:31,372 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-08-22 23:15:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 23:15:31,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 55 [2020-08-22 23:15:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:31,375 INFO L225 Difference]: With dead ends: 83 [2020-08-22 23:15:31,376 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 23:15:31,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=264, Invalid=2088, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:15:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 23:15:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2020-08-22 23:15:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 23:15:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-22 23:15:31,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 55 [2020-08-22 23:15:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:31,421 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-22 23:15:31,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 23:15:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-22 23:15:31,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 23:15:31,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:31,422 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 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, 1] [2020-08-22 23:15:31,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:15:31,423 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:31,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash 742475281, now seen corresponding path program 9 times [2020-08-22 23:15:31,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:31,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200440142] [2020-08-22 23:15:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:32,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:32,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200440142] [2020-08-22 23:15:32,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:32,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 23:15:32,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127342248] [2020-08-22 23:15:32,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:15:32,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:32,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:15:32,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:15:32,388 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 16 states. [2020-08-22 23:15:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:36,427 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-22 23:15:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:15:36,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 59 [2020-08-22 23:15:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:36,430 INFO L225 Difference]: With dead ends: 80 [2020-08-22 23:15:36,431 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 23:15:36,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:15:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 23:15:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-08-22 23:15:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-22 23:15:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-08-22 23:15:36,462 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2020-08-22 23:15:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:36,463 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-08-22 23:15:36,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:15:36,463 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-08-22 23:15:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:15:36,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:36,464 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 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, 1] [2020-08-22 23:15:36,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:15:36,464 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:36,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash 847189346, now seen corresponding path program 10 times [2020-08-22 23:15:36,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:36,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210453587] [2020-08-22 23:15:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:36,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:36,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210453587] [2020-08-22 23:15:36,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:36,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:15:36,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511502389] [2020-08-22 23:15:36,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:15:36,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:15:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:15:36,756 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 11 states. [2020-08-22 23:15:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:37,495 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-08-22 23:15:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:15:37,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-08-22 23:15:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:37,497 INFO L225 Difference]: With dead ends: 79 [2020-08-22 23:15:37,498 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 23:15:37,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:15:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 23:15:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 23:15:37,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 23:15:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-08-22 23:15:37,516 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2020-08-22 23:15:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:37,517 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-08-22 23:15:37,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:15:37,517 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-08-22 23:15:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:15:37,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:37,518 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 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, 1] [2020-08-22 23:15:37,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:15:37,519 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:37,519 INFO L82 PathProgramCache]: Analyzing trace with hash 148196802, now seen corresponding path program 11 times [2020-08-22 23:15:37,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:37,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468998430] [2020-08-22 23:15:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:39,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:15:39,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468998430] [2020-08-22 23:15:39,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:39,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 23:15:39,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694116388] [2020-08-22 23:15:39,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 23:15:39,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 23:15:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:15:39,672 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 29 states. [2020-08-22 23:15:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:42,855 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-08-22 23:15:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 23:15:42,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-08-22 23:15:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:42,862 INFO L225 Difference]: With dead ends: 78 [2020-08-22 23:15:42,862 INFO L226 Difference]: Without dead ends: 73 [2020-08-22 23:15:42,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=287, Invalid=2469, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:15:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-22 23:15:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-08-22 23:15:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 23:15:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-08-22 23:15:42,891 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 60 [2020-08-22 23:15:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:42,891 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-08-22 23:15:42,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 23:15:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-08-22 23:15:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 23:15:42,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:42,892 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 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, 1] [2020-08-22 23:15:42,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:15:42,893 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1879028724, now seen corresponding path program 12 times [2020-08-22 23:15:42,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:42,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674104315] [2020-08-22 23:15:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:12,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:16:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 20 proven. 95 refuted. 22 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:16:12,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674104315] [2020-08-22 23:16:12,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:16:12,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:16:12,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989495583] [2020-08-22 23:16:12,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 23:16:12,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:16:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 23:16:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=185, Unknown=13, NotChecked=0, Total=240 [2020-08-22 23:16:12,189 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 16 states. [2020-08-22 23:16:41,758 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0))) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 6 .cse0) (* 8589934593 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) (* 8589934592 .cse2) 1)))) (* 2 c_main_~l~0))) is different from false [2020-08-22 23:17:17,829 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 42 [2020-08-22 23:17:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:17:58,107 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-22 23:17:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:17:58,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-08-22 23:17:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:17:58,109 INFO L225 Difference]: With dead ends: 82 [2020-08-22 23:17:58,109 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 23:17:58,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 72.1s TimeCoverageRelationStatistics Valid=139, Invalid=705, Unknown=30, NotChecked=56, Total=930 [2020-08-22 23:17:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 23:17:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 23:17:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 23:17:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 23:17:58,129 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2020-08-22 23:17:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:17:58,129 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 23:17:58,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 23:17:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 23:17:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 23:17:58,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:17:58,129 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 3, 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] [2020-08-22 23:17:58,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:17:58,130 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:17:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:17:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1720607711, now seen corresponding path program 13 times [2020-08-22 23:17:58,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:17:58,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080701459] [2020-08-22 23:17:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:17:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:00,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:18:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:18:00,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080701459] [2020-08-22 23:18:00,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:18:00,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 23:18:00,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404261736] [2020-08-22 23:18:00,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 23:18:00,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:18:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 23:18:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:18:00,238 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 31 states. [2020-08-22 23:18:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:18:03,531 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2020-08-22 23:18:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 23:18:03,532 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-08-22 23:18:03,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:18:03,533 INFO L225 Difference]: With dead ends: 93 [2020-08-22 23:18:03,533 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 23:18:03,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=310, Invalid=2882, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:18:03,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 23:18:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2020-08-22 23:18:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 23:18:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-08-22 23:18:03,553 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2020-08-22 23:18:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:18:03,554 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-08-22 23:18:03,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 23:18:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-08-22 23:18:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 23:18:03,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:18:03,555 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 4, 3, 3, 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] [2020-08-22 23:18:03,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:18:03,555 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:18:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:18:03,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2133429359, now seen corresponding path program 14 times [2020-08-22 23:18:03,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:18:03,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977685702] [2020-08-22 23:18:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:18:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:18:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:18:06,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977685702] [2020-08-22 23:18:06,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:18:06,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 23:18:06,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510513613] [2020-08-22 23:18:06,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 23:18:06,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:18:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 23:18:06,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:18:06,587 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 33 states. [2020-08-22 23:18:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:18:10,345 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-08-22 23:18:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 23:18:10,346 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2020-08-22 23:18:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:18:10,347 INFO L225 Difference]: With dead ends: 97 [2020-08-22 23:18:10,347 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 23:18:10,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=333, Invalid=3327, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:18:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 23:18:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2020-08-22 23:18:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 23:18:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-08-22 23:18:10,371 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 69 [2020-08-22 23:18:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:18:10,372 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-08-22 23:18:10,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 23:18:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-08-22 23:18:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 23:18:10,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:18:10,372 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 3, 3, 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] [2020-08-22 23:18:10,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:18:10,373 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:18:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:18:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash 340482627, now seen corresponding path program 15 times [2020-08-22 23:18:10,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:18:10,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743420730] [2020-08-22 23:18:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:18:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:42,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:18:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:18:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 25 proven. 152 refuted. 30 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:18:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743420730] [2020-08-22 23:18:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:18:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:18:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782946201] [2020-08-22 23:18:42,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:18:42,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:18:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:18:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=246, Unknown=13, NotChecked=0, Total=306 [2020-08-22 23:18:42,612 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 18 states. [2020-08-22 23:18:51,928 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification that was a NOOP. DAG size: 41 [2020-08-22 23:19:14,665 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 40 [2020-08-22 23:21:39,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:21:39,130 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2020-08-22 23:21:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:21:39,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-08-22 23:21:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:21:39,133 INFO L225 Difference]: With dead ends: 93 [2020-08-22 23:21:39,133 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 23:21:39,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 95.0s TimeCoverageRelationStatistics Valid=170, Invalid=1058, Unknown=32, NotChecked=0, Total=1260 [2020-08-22 23:21:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 23:21:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-08-22 23:21:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 23:21:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 23:21:39,158 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2020-08-22 23:21:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:21:39,159 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 23:21:39,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:21:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 23:21:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 23:21:39,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:21:39,160 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 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] [2020-08-22 23:21:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:21:39,160 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:21:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:21:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1270318960, now seen corresponding path program 16 times [2020-08-22 23:21:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:21:39,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64815689] [2020-08-22 23:21:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:21:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:21:41,048 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-08-22 23:21:45,421 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-08-22 23:21:47,906 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-08-22 23:21:48,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:21:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:21:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:21:49,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64815689] [2020-08-22 23:21:49,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:21:49,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 23:21:49,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075640528] [2020-08-22 23:21:49,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 23:21:49,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:21:49,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 23:21:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1095, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:21:49,100 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 35 states. [2020-08-22 23:21:54,902 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 35 [2020-08-22 23:21:57,341 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 47 [2020-08-22 23:22:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:22:02,464 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-08-22 23:22:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 23:22:02,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-08-22 23:22:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:22:02,467 INFO L225 Difference]: With dead ends: 105 [2020-08-22 23:22:02,468 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 23:22:02,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=356, Invalid=3804, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:22:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 23:22:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-08-22 23:22:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 23:22:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-08-22 23:22:02,494 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 74 [2020-08-22 23:22:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:22:02,494 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-08-22 23:22:02,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 23:22:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-08-22 23:22:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 23:22:02,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:22:02,495 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 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] [2020-08-22 23:22:02,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:22:02,495 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:22:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:22:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash 571326416, now seen corresponding path program 17 times [2020-08-22 23:22:02,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:22:02,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967639956] [2020-08-22 23:22:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:22:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:22:02,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:22:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:22:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 24 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:22:02,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967639956] [2020-08-22 23:22:02,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:22:02,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:22:02,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770367462] [2020-08-22 23:22:02,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:22:02,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:22:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:22:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:22:02,894 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 14 states. [2020-08-22 23:22:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:22:04,268 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-08-22 23:22:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:22:04,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2020-08-22 23:22:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:22:04,270 INFO L225 Difference]: With dead ends: 94 [2020-08-22 23:22:04,271 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 23:22:04,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:22:04,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 23:22:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-08-22 23:22:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-22 23:22:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-08-22 23:22:04,296 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 74 [2020-08-22 23:22:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:22:04,296 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-08-22 23:22:04,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:22:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-08-22 23:22:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 23:22:04,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:22:04,297 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 5, 5, 4, 4, 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] [2020-08-22 23:22:04,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:22:04,297 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:22:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:22:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1632541022, now seen corresponding path program 18 times [2020-08-22 23:22:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:22:04,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452124782] [2020-08-22 23:22:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:22:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:22:52,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:22:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:22:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 27 proven. 186 refuted. 37 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:22:52,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452124782] [2020-08-22 23:22:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:22:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:22:52,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255714876] [2020-08-22 23:22:52,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:22:52,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:22:52,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:22:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=269, Unknown=22, NotChecked=0, Total=342 [2020-08-22 23:22:52,753 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 19 states. [2020-08-22 23:23:04,441 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification that was a NOOP. DAG size: 45 [2020-08-22 23:23:30,718 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0))) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse2 (div c_main_~l~0 4294967296))) (let ((.cse1 (* .cse2 (- 4294967296)))) (let ((.cse0 (div (+ c_main_~l~0 .cse1) 3))) (+ (* 6 .cse0) (* 8589934593 (div (+ (* .cse0 (- 3)) c_main_~l~0 .cse1) 4294967296)) (* 8589934592 .cse2) 1)))) (* 2 c_main_~l~0))) is different from false [2020-08-22 23:24:46,876 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 42 [2020-08-22 23:25:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:25:45,150 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-08-22 23:25:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 23:25:45,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-08-22 23:25:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:25:45,154 INFO L225 Difference]: With dead ends: 104 [2020-08-22 23:25:45,154 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 23:25:45,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 133.8s TimeCoverageRelationStatistics Valid=216, Invalid=1219, Unknown=51, NotChecked=74, Total=1560 [2020-08-22 23:25:45,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 23:25:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2020-08-22 23:25:45,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 23:25:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-08-22 23:25:45,179 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 78 [2020-08-22 23:25:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:25:45,180 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-08-22 23:25:45,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:25:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-08-22 23:25:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 23:25:45,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:25:45,180 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 5, 5, 4, 4, 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] [2020-08-22 23:25:45,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:25:45,181 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:25:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:25:45,181 INFO L82 PathProgramCache]: Analyzing trace with hash 236127985, now seen corresponding path program 19 times [2020-08-22 23:25:45,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:25:45,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529886564] [2020-08-22 23:25:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:25:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:25:45,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:25:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:25:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 27 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:25:45,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529886564] [2020-08-22 23:25:45,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:25:45,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:25:45,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44381080] [2020-08-22 23:25:45,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:25:45,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:25:45,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:25:45,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:25:45,652 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 15 states. [2020-08-22 23:25:47,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:25:47,001 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2020-08-22 23:25:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 23:25:47,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 79 [2020-08-22 23:25:47,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:25:47,003 INFO L225 Difference]: With dead ends: 98 [2020-08-22 23:25:47,003 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 23:25:47,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:25:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 23:25:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-08-22 23:25:47,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 23:25:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-22 23:25:47,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2020-08-22 23:25:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:25:47,034 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-22 23:25:47,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:25:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-22 23:25:47,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 23:25:47,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:25:47,034 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:25:47,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:25:47,035 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:25:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:25:47,035 INFO L82 PathProgramCache]: Analyzing trace with hash -462864559, now seen corresponding path program 20 times [2020-08-22 23:25:47,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:25:47,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336001510] [2020-08-22 23:25:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:25:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:25:50,063 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2020-08-22 23:25:50,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:25:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:25:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:25:50,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336001510] [2020-08-22 23:25:50,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:25:50,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 23:25:50,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070084580] [2020-08-22 23:25:50,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 23:25:50,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:25:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 23:25:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:25:50,742 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 37 states. [2020-08-22 23:25:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:25:56,871 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-08-22 23:25:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 23:25:56,872 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-08-22 23:25:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:25:56,873 INFO L225 Difference]: With dead ends: 97 [2020-08-22 23:25:56,873 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 23:25:56,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:25:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 23:25:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2020-08-22 23:25:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 23:25:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 23:25:56,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 79 [2020-08-22 23:25:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:25:56,899 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 23:25:56,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 23:25:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 23:25:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 23:25:56,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:25:56,900 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:25:56,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:25:56,900 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:25:56,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:25:56,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1777187325, now seen corresponding path program 21 times [2020-08-22 23:25:56,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:25:56,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114776936] [2020-08-22 23:25:56,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:25:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:25:59,849 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-08-22 23:26:01,206 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-08-22 23:26:01,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:26:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:26:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:26:01,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114776936] [2020-08-22 23:26:01,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:26:01,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 23:26:01,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956767311] [2020-08-22 23:26:01,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 23:26:01,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:26:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 23:26:01,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:26:01,972 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 39 states. [2020-08-22 23:26:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:26:09,152 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-22 23:26:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 23:26:09,153 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-08-22 23:26:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:26:09,155 INFO L225 Difference]: With dead ends: 111 [2020-08-22 23:26:09,155 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 23:26:09,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=402, Invalid=4854, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:26:09,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 23:26:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2020-08-22 23:26:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 23:26:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-08-22 23:26:09,183 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 83 [2020-08-22 23:26:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:26:09,183 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-08-22 23:26:09,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 23:26:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-08-22 23:26:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 23:26:09,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:26:09,184 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:26:09,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:26:09,185 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:26:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:26:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1449876555, now seen corresponding path program 22 times [2020-08-22 23:26:09,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:26:09,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286677433] [2020-08-22 23:26:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:26:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:27:31,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:27:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:27:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 32 proven. 216 refuted. 94 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:27:31,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286677433] [2020-08-22 23:27:31,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:27:31,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:27:31,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139219267] [2020-08-22 23:27:31,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 23:27:31,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:27:31,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 23:27:31,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=328, Unknown=36, NotChecked=0, Total=420 [2020-08-22 23:27:31,640 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 21 states. [2020-08-22 23:28:16,791 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* 4294967296 (div c_main_~n~0 4294967296)) (* 8589934593 c_main_~l~0)))) (and (<= (+ (* 12884901888 (div (+ (* c_main_~l~0 2863311531) (- 1431655767)) 4294967296)) c_main_~n~0 17159869185) .cse0) (= c_~SIZE~0 |c_old(~SIZE~0)|) (<= (let ((.cse3 (div c_main_~l~0 4294967296))) (let ((.cse2 (* .cse3 (- 4294967296)))) (let ((.cse1 (div (+ c_main_~l~0 .cse2) 3))) (+ (* 25769803776 .cse1) (* 36893488151714070528 (div (+ (* .cse1 (- 3)) c_main_~l~0 .cse2) 4294967296)) c_main_~n~0 (* 36893488151714070528 .cse3) 8569934604)))) .cse0))) is different from false