/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:59:24,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:59:24,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:59:24,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:59:24,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:59:24,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:59:24,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:59:24,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:59:24,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:59:24,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:59:24,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:59:24,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:59:24,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:59:24,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:59:24,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:59:24,095 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:59:24,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:59:24,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:59:24,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:59:24,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:59:24,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:59:24,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:59:24,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:59:24,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:59:24,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:59:24,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:59:24,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:59:24,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:59:24,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:59:24,139 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:59:24,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:59:24,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:59:24,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:59:24,141 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:59:24,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:59:24,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:59:24,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:59:24,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:59:24,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:59:24,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:59:24,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:59:24,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:59:24,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:59:24,144 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:59:24,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:59:24,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:59:24,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:59:24,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:59:24,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:59:24,145 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:59:24,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:59:24,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:59:24,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:59:24,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:59:24,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:59:24,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:59:24,440 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:59:24,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:59:24,442 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:59:24,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3.c [2020-08-22 16:59:24,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36e0b1b4/817546e949c9472c9292e2a9972f08ff/FLAGdfe648e0c [2020-08-22 16:59:24,956 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:59:24,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3.c [2020-08-22 16:59:24,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36e0b1b4/817546e949c9472c9292e2a9972f08ff/FLAGdfe648e0c [2020-08-22 16:59:25,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a36e0b1b4/817546e949c9472c9292e2a9972f08ff [2020-08-22 16:59:25,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:59:25,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:59:25,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:59:25,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:59:25,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:59:25,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c2d0e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25, skipping insertion in model container [2020-08-22 16:59:25,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:59:25,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:59:25,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:59:25,603 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:59:25,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:59:25,632 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:59:25,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25 WrapperNode [2020-08-22 16:59:25,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:59:25,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:59:25,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:59:25,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:59:25,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (1/1) ... [2020-08-22 16:59:25,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:59:25,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:59:25,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:59:25,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:59:25,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (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 16:59:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:59:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:59:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:59:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:59:25,814 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:59:25,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:59:25,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:59:25,998 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:59:25,999 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 16:59:26,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:59:26 BoogieIcfgContainer [2020-08-22 16:59:26,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:59:26,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:59:26,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:59:26,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:59:26,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:59:25" (1/3) ... [2020-08-22 16:59:26,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195fef1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:59:26, skipping insertion in model container [2020-08-22 16:59:26,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:59:25" (2/3) ... [2020-08-22 16:59:26,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195fef1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:59:26, skipping insertion in model container [2020-08-22 16:59:26,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:59:26" (3/3) ... [2020-08-22 16:59:26,011 INFO L109 eAbstractionObserver]: Analyzing ICFG ps3.c [2020-08-22 16:59:26,022 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:59:26,030 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:59:26,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:59:26,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:59:26,110 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:59:26,111 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:59:26,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:59:26,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:59:26,111 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:59:26,111 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:59:26,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:59:26,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:59:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:59:26,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:26,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:26,150 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-08-22 16:59:26,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:26,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060471179] [2020-08-22 16:59:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:59:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:26,267 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 16:59:26,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060471179] [2020-08-22 16:59:26,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:59:26,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 16:59:26,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573780168] [2020-08-22 16:59:26,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 16:59:26,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:59:26,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 16:59:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:59:26,293 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-22 16:59:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:59:26,318 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-08-22 16:59:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 16:59:26,320 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 16:59:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:59:26,330 INFO L225 Difference]: With dead ends: 35 [2020-08-22 16:59:26,330 INFO L226 Difference]: Without dead ends: 15 [2020-08-22 16:59:26,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 16:59:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-22 16:59:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-22 16:59:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 16:59:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-22 16:59:26,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-22 16:59:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:59:26,377 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-22 16:59:26,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 16:59:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-22 16:59:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 16:59:26,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:26,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:26,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:59:26,379 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-08-22 16:59:26,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:26,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555707068] [2020-08-22 16:59:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:26,388 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:59:26,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570084237] [2020-08-22 16:59:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:59:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-08-22 16:59:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:59:26,540 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 16:59:26,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555707068] [2020-08-22 16:59:26,541 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:59:26,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570084237] [2020-08-22 16:59:26,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:59:26,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:59:26,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912810427] [2020-08-22 16:59:26,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:59:26,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:59:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:59:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:59:26,546 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-08-22 16:59:26,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:59:26,626 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-08-22 16:59:26,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:59:26,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-22 16:59:26,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:59:26,628 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:59:26,629 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:59:26,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:59:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:59:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 16:59:26,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 16:59:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 16:59:26,638 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-08-22 16:59:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:59:26,639 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 16:59:26,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:59:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 16:59:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 16:59:26,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:26,641 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:26,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:59:26,853 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-08-22 16:59:26,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:26,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036708308] [2020-08-22 16:59:26,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:26,866 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:59:26,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429923859] [2020-08-22 16:59:26,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:59:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:59:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:59:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:59:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:59:26,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036708308] [2020-08-22 16:59:26,999 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:59:26,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429923859] [2020-08-22 16:59:27,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:59:27,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 16:59:27,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318373876] [2020-08-22 16:59:27,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:59:27,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:59:27,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:59:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:59:27,002 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-08-22 16:59:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:59:27,077 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-08-22 16:59:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:59:27,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 16:59:27,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:59:27,079 INFO L225 Difference]: With dead ends: 32 [2020-08-22 16:59:27,080 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:59:27,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:59:27,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:59:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 16:59:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 16:59:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-08-22 16:59:27,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-08-22 16:59:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:59:27,089 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-08-22 16:59:27,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:59:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-08-22 16:59:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:59:27,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:27,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:27,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:59:27,305 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:27,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-08-22 16:59:27,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:27,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131865632] [2020-08-22 16:59:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:27,313 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:59:27,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934709304] [2020-08-22 16:59:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:59:27,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:59:27,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:59:27,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:59:27,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:59:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 16:59:27,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131865632] [2020-08-22 16:59:27,484 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:59:27,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934709304] [2020-08-22 16:59:27,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:59:27,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:59:27,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740938537] [2020-08-22 16:59:27,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:59:27,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:59:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:59:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:59:27,487 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-08-22 16:59:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:59:27,654 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-08-22 16:59:27,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:59:27,654 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-08-22 16:59:27,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:59:27,656 INFO L225 Difference]: With dead ends: 39 [2020-08-22 16:59:27,656 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:59:27,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:59:27,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:59:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:59:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:59:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:59:27,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-08-22 16:59:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:59:27,666 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:59:27,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:59:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:59:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:59:27,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:59:27,668 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:59:27,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:59:27,883 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:59:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:59:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-08-22 16:59:27,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:59:27,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087374397] [2020-08-22 16:59:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:59:27,891 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:59:27,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664827253] [2020-08-22 16:59:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true