/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/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:34:42,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:34:42,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:34:42,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:34:42,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:34:42,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:34:42,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:34:42,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:34:42,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:34:42,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:34:42,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:34:42,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:34:42,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:34:42,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:34:42,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:34:42,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:34:42,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:34:42,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:34:42,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:34:42,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:34:42,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:34:42,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:34:42,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:34:42,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:34:42,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:34:42,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:34:42,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:34:42,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:34:42,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:34:42,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:34:42,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:34:42,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:34:42,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:34:42,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:34:42,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:34:42,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:34:42,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:34:42,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:34:42,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:34:42,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:34:42,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:34:42,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:34:42,733 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:34:42,733 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:34:42,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:34:42,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:34:42,737 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:34:42,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:34:42,737 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:34:42,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:34:42,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:34:42,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:34:42,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:34:42,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:34:42,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:34:42,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:34:42,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:34:42,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:34:42,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:34:42,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:34:42,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:34:42,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:34:42,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:34:42,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:42,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:34:42,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:34:42,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:34:42,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:34:42,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:34:42,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:34:42,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:34:42,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:34:43,085 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:34:43,103 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:34:43,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:34:43,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:34:43,110 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:34:43,111 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-07 11:34:43,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3106dd5/3e1d64a7b6d647168d4fc40271117dc1/FLAGe7eb1403b [2020-07-07 11:34:43,727 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:34:43,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-07-07 11:34:43,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3106dd5/3e1d64a7b6d647168d4fc40271117dc1/FLAGe7eb1403b [2020-07-07 11:34:44,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f3106dd5/3e1d64a7b6d647168d4fc40271117dc1 [2020-07-07 11:34:44,096 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:34:44,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:34:44,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:44,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:34:44,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:34:44,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df6c900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44, skipping insertion in model container [2020-07-07 11:34:44,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:34:44,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:34:44,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:44,349 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:34:44,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:44,389 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:34:44,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44 WrapperNode [2020-07-07 11:34:44,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:44,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:34:44,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:34:44,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:34:44,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... [2020-07-07 11:34:44,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:34:44,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:34:44,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:34:44,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:34:44,430 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:44,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:34:44,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:34:44,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:34:44,609 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:34:44,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:34:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:34:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:34:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:34:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:34:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:34:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:34:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:34:44,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:34:44,828 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:34:44,829 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:34:44,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:44 BoogieIcfgContainer [2020-07-07 11:34:44,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:34:44,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:34:44,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:34:44,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:34:44,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:34:44" (1/3) ... [2020-07-07 11:34:44,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcf3705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:44, skipping insertion in model container [2020-07-07 11:34:44,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:44" (2/3) ... [2020-07-07 11:34:44,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcf3705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:44, skipping insertion in model container [2020-07-07 11:34:44,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:44" (3/3) ... [2020-07-07 11:34:44,842 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-07-07 11:34:44,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:34:44,859 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:34:44,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:34:44,901 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:34:44,901 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:34:44,901 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:34:44,901 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:34:44,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:34:44,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:34:44,902 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:34:44,902 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:34:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:34:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:44,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:44,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:44,930 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-07 11:34:44,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:44,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364655484] [2020-07-07 11:34:44,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:45,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:45,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364655484] [2020-07-07 11:34:45,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:45,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:34:45,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256017115] [2020-07-07 11:34:45,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:34:45,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:34:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:45,092 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-07 11:34:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:45,115 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-07 11:34:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:34:45,117 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-07 11:34:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:45,125 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:34:45,125 INFO L226 Difference]: Without dead ends: 15 [2020-07-07 11:34:45,128 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 [2020-07-07 11:34:45,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-07 11:34:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-07 11:34:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-07 11:34:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-07 11:34:45,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-07 11:34:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:45,171 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-07 11:34:45,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:34:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-07 11:34:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:45,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:45,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:45,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:34:45,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:45,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:45,174 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-07 11:34:45,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:45,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155565781] [2020-07-07 11:34:45,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:45,184 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:45,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744144224] [2020-07-07 11:34:45,185 INFO L94 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 [2020-07-07 11:34:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:45,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:34:45,236 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:45,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155565781] [2020-07-07 11:34:45,344 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:45,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744144224] [2020-07-07 11:34:45,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:45,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:34:45,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417928464] [2020-07-07 11:34:45,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:34:45,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:34:45,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:34:45,349 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-07 11:34:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:45,414 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-07 11:34:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:34:45,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-07 11:34:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:45,417 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:34:45,417 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 11:34:45,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 11:34:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 11:34:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 11:34:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 11:34:45,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-07 11:34:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:45,427 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 11:34:45,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:34:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 11:34:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 11:34:45,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:45,429 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:45,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:34:45,645 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-07 11:34:45,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:45,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599393325] [2020-07-07 11:34:45,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:45,657 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:45,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732566180] [2020-07-07 11:34:45,658 INFO L94 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 [2020-07-07 11:34:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:45,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:34:45,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599393325] [2020-07-07 11:34:45,779 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:45,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732566180] [2020-07-07 11:34:45,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:45,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-07 11:34:45,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979779473] [2020-07-07 11:34:45,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:34:45,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:34:45,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:45,782 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-07 11:34:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:45,864 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-07 11:34:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:34:45,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-07 11:34:45,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:45,867 INFO L225 Difference]: With dead ends: 32 [2020-07-07 11:34:45,867 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 11:34:45,868 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 [2020-07-07 11:34:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 11:34:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-07 11:34:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:34:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-07 11:34:45,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-07 11:34:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:45,878 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-07 11:34:45,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:34:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-07 11:34:45,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:34:45,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:45,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:46,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:46,088 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-07 11:34:46,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:46,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743785807] [2020-07-07 11:34:46,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:46,110 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:46,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693822444] [2020-07-07 11:34:46,110 INFO L92 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 [2020-07-07 11:34:46,160 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:34:46,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:46,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-07 11:34:46,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-07 11:34:46,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743785807] [2020-07-07 11:34:46,245 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:46,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693822444] [2020-07-07 11:34:46,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:46,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-07 11:34:46,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994729219] [2020-07-07 11:34:46,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:34:46,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:46,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:34:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:46,248 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-07-07 11:34:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:46,351 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-07 11:34:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:34:46,352 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-07-07 11:34:46,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:46,353 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:34:46,354 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:34:46,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:34:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:34:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:34:46,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:34:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:34:46,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-07 11:34:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:46,366 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:34:46,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:34:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:34:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:34:46,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:46,368 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:46,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:46,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-07 11:34:46,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:46,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030377248] [2020-07-07 11:34:46,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:46,591 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:46,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10576273] [2020-07-07 11:34:46,593 INFO L92 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 [2020-07-07 11:34:46,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 11:34:46,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:46,625 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:34:46,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:46,723 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:34:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-07 11:34:46,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030377248] [2020-07-07 11:34:46,777 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:46,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10576273] [2020-07-07 11:34:46,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:46,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-07 11:34:46,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036611223] [2020-07-07 11:34:46,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:34:46,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:34:46,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:46,780 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2020-07-07 11:34:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:46,838 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-07-07 11:34:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:34:46,838 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-07-07 11:34:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:46,839 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:34:46,839 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:34:46,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:34:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:34:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:34:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:34:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:34:46,842 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-07 11:34:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:46,842 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:34:46,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:34:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:34:46,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:34:47,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:47,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:34:47,161 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:34:47,161 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:34:47,161 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:34:47,162 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:34:47,162 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:34:47,162 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:34:47,163 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:34:47,163 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-07 11:34:47,163 INFO L268 CegarLoopResult]: For program point L5-2(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:34:47,163 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-07 11:34:47,164 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-07-07 11:34:47,164 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 15 36) the Hoare annotation is: true [2020-07-07 11:34:47,164 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 15 36) no Hoare annotation was computed. [2020-07-07 11:34:47,164 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-07 11:34:47,166 INFO L268 CegarLoopResult]: For program point L24-1(lines 23 32) no Hoare annotation was computed. [2020-07-07 11:34:47,167 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 32) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-07 11:34:47,167 INFO L264 CegarLoopResult]: At program point L23-3(lines 23 32) the Hoare annotation is: (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) [2020-07-07 11:34:47,167 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 15 36) no Hoare annotation was computed. [2020-07-07 11:34:47,167 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 7 13) the Hoare annotation is: true [2020-07-07 11:34:47,168 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 7 13) no Hoare annotation was computed. [2020-07-07 11:34:47,168 INFO L268 CegarLoopResult]: For program point L9(lines 9 10) no Hoare annotation was computed. [2020-07-07 11:34:47,168 INFO L268 CegarLoopResult]: For program point L8(lines 8 11) no Hoare annotation was computed. [2020-07-07 11:34:47,168 INFO L268 CegarLoopResult]: For program point L8-2(lines 7 13) no Hoare annotation was computed. [2020-07-07 11:34:47,168 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2020-07-07 11:34:47,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:34:47 BoogieIcfgContainer [2020-07-07 11:34:47,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:34:47,193 INFO L168 Benchmark]: Toolchain (without parser) took 3093.46 ms. Allocated memory was 143.7 MB in the beginning and 231.2 MB in the end (delta: 87.6 MB). Free memory was 101.9 MB in the beginning and 179.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,194 INFO L168 Benchmark]: CDTParser took 1.45 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.45 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,196 INFO L168 Benchmark]: Boogie Preprocessor took 36.20 ms. Allocated memory is still 143.7 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,197 INFO L168 Benchmark]: RCFGBuilder took 405.23 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.7 MB in the beginning and 168.4 MB in the end (delta: -77.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,198 INFO L168 Benchmark]: TraceAbstraction took 2354.17 ms. Allocated memory was 201.3 MB in the beginning and 231.2 MB in the end (delta: 29.9 MB). Free memory was 167.7 MB in the beginning and 179.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:34:47,203 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.45 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.45 ms. Allocated memory is still 143.7 MB. Free memory was 101.7 MB in the beginning and 92.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.20 ms. Allocated memory is still 143.7 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 405.23 ms. Allocated memory was 143.7 MB in the beginning and 201.3 MB in the end (delta: 57.7 MB). Free memory was 90.7 MB in the beginning and 168.4 MB in the end (delta: -77.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2354.17 ms. Allocated memory was 201.3 MB in the beginning and 231.2 MB in the end (delta: 29.9 MB). Free memory was 167.7 MB in the beginning and 179.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: x * 2 == y + y * y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 76 SDtfs, 26 SDslu, 201 SDs, 0 SdLazy, 110 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 29 NumberOfFragments, 32 HoareAnnotationTreeSize, 17 FomulaSimplifications, 112 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 92 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 87 ConstructedInterpolants, 0 QuantifiedInterpolants, 4995 SizeOfPredicates, 9 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 42/52 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...