/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:51:24,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:51:24,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:51:24,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:51:24,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:51:24,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:51:24,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:51:24,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:51:24,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:51:24,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:51:24,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:51:24,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:51:24,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:51:24,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:51:24,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:51:24,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:51:24,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:51:24,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:51:24,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:51:24,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:51:24,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:51:24,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:51:24,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:51:24,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:51:24,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:51:24,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:51:24,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:51:24,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:51:24,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:51:24,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 01:51:24,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 01:51:24,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 01:51:24,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 01:51:24,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 01:51:24,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 01:51:24,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 01:51:24,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 01:51:24,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 01:51:24,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:51:24,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:51:24,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:51:24,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 01:51:24,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:51:24,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:51:24,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:51:24,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:51:24,846 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:51:24,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:51:24,846 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:51:24,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:51:24,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:51:24,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:51:24,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:51:24,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:51:24,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:51:24,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:51:24,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:51:24,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:51:24,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:51:24,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:51:24,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:51:24,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:51:24,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:51:24,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:51:24,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:51:24,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:51:24,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:51:24,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:51:24,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:51:24,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:51:24,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:51:24,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:51:25,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:51:25,134 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:51:25,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:51:25,139 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:51:25,139 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:51:25,140 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-20 01:51:25,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddf563cf/e6781245a2d5446e8067205d5b174633/FLAG5ff7626bf [2020-07-20 01:51:25,639 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:51:25,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-20 01:51:25,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddf563cf/e6781245a2d5446e8067205d5b174633/FLAG5ff7626bf [2020-07-20 01:51:26,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dddf563cf/e6781245a2d5446e8067205d5b174633 [2020-07-20 01:51:26,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:51:26,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:51:26,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:51:26,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:51:26,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:51:26,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255720ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26, skipping insertion in model container [2020-07-20 01:51:26,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:51:26,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:51:26,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:51:26,292 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:51:26,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:51:26,320 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:51:26,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26 WrapperNode [2020-07-20 01:51:26,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:51:26,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:51:26,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:51:26,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:51:26,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... [2020-07-20 01:51:26,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:51:26,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:51:26,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:51:26,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:51:26,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:51:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:51:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:51:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:51:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:51:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 01:51:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:51:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:51:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:51:26,678 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:51:26,678 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-20 01:51:26,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:51:26 BoogieIcfgContainer [2020-07-20 01:51:26,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:51:26,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:51:26,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:51:26,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:51:26,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:51:26" (1/3) ... [2020-07-20 01:51:26,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:51:26, skipping insertion in model container [2020-07-20 01:51:26,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:51:26" (2/3) ... [2020-07-20 01:51:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b67d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:51:26, skipping insertion in model container [2020-07-20 01:51:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:51:26" (3/3) ... [2020-07-20 01:51:26,690 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-20 01:51:26,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:51:26,708 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:51:26,722 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:51:26,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:51:26,746 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:51:26,746 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:51:26,746 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:51:26,746 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:51:26,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:51:26,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:51:26,747 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:51:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 01:51:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:51:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:26,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:26,773 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-20 01:51:26,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:26,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224715438] [2020-07-20 01:51:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:51:26,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224715438] [2020-07-20 01:51:26,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:51:26,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 01:51:26,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586448150] [2020-07-20 01:51:26,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 01:51:26,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 01:51:26,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 01:51:26,921 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 01:51:26,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:26,945 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-20 01:51:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 01:51:26,947 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 01:51:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:26,955 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:51:26,955 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 01:51:26,959 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 [2020-07-20 01:51:26,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 01:51:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 01:51:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 01:51:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-20 01:51:26,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-20 01:51:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:26,999 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-20 01:51:26,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 01:51:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-20 01:51:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:51:27,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:27,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:27,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:51:27,001 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:27,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-20 01:51:27,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:27,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048425222] [2020-07-20 01:51:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:51:27,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048425222] [2020-07-20 01:51:27,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:51:27,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:51:27,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592196223] [2020-07-20 01:51:27,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:51:27,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:51:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:51:27,057 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-20 01:51:27,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:27,072 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-20 01:51:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:51:27,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 01:51:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:27,074 INFO L225 Difference]: With dead ends: 20 [2020-07-20 01:51:27,074 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 01:51:27,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:51:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 01:51:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 01:51:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 01:51:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-20 01:51:27,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-20 01:51:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:27,082 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-20 01:51:27,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:51:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-20 01:51:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:51:27,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:27,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:27,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:51:27,084 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:27,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-20 01:51:27,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:27,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529286229] [2020-07-20 01:51:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:51:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529286229] [2020-07-20 01:51:27,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:51:27,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:51:27,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803393796] [2020-07-20 01:51:27,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:51:27,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:51:27,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:51:27,126 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-20 01:51:27,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:27,140 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-20 01:51:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:51:27,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-20 01:51:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:27,143 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:51:27,144 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 01:51:27,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:51:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 01:51:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 01:51:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 01:51:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-20 01:51:27,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-20 01:51:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:27,152 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-20 01:51:27,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:51:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-20 01:51:27,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 01:51:27,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:27,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:27,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:51:27,154 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:27,156 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-20 01:51:27,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:27,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696049429] [2020-07-20 01:51:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:51:27,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696049429] [2020-07-20 01:51:27,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175879710] [2020-07-20 01:51:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4002230d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:27,318 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4002230d issued 2 check-sat command(s) [2020-07-20 01:51:27,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:51:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:51:27,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:27,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-07-20 01:51:27,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367702825] [2020-07-20 01:51:27,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:51:27,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:51:27,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:51:27,388 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-07-20 01:51:27,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:27,501 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-07-20 01:51:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:51:27,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-20 01:51:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:27,502 INFO L225 Difference]: With dead ends: 30 [2020-07-20 01:51:27,503 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 01:51:27,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:51:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 01:51:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 01:51:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:51:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 01:51:27,510 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2020-07-20 01:51:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 01:51:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:51:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 01:51:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 01:51:27,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:27,512 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:27,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:27,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1734889408, now seen corresponding path program 2 times [2020-07-20 01:51:27,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:27,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854210657] [2020-07-20 01:51:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:27,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854210657] [2020-07-20 01:51:27,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749663940] [2020-07-20 01:51:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@414aa71a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:27,859 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@414aa71a issued 2 check-sat command(s) [2020-07-20 01:51:27,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:51:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:27,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:27,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 01:51:27,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332399150] [2020-07-20 01:51:27,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:51:27,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:51:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:51:27,955 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 01:51:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:28,023 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-20 01:51:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:51:28,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-20 01:51:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:28,025 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:51:28,025 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 01:51:28,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:51:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 01:51:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 01:51:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 01:51:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-20 01:51:28,035 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2020-07-20 01:51:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:28,036 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-20 01:51:28,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:51:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-20 01:51:28,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 01:51:28,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:28,038 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:28,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:28,252 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:28,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1612949224, now seen corresponding path program 3 times [2020-07-20 01:51:28,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:28,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791363744] [2020-07-20 01:51:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:28,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791363744] [2020-07-20 01:51:28,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003303762] [2020-07-20 01:51:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4840a1ac No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 01:51:28,401 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4840a1ac issued 2 check-sat command(s) [2020-07-20 01:51:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:51:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:28,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:28,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-20 01:51:28,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891174947] [2020-07-20 01:51:28,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:51:28,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:51:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:51:28,489 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 11 states. [2020-07-20 01:51:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:28,604 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-07-20 01:51:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:51:28,605 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-07-20 01:51:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:28,606 INFO L225 Difference]: With dead ends: 35 [2020-07-20 01:51:28,606 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 01:51:28,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:51:28,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 01:51:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 01:51:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 01:51:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-20 01:51:28,612 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 21 [2020-07-20 01:51:28,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:28,612 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-20 01:51:28,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:51:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-20 01:51:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 01:51:28,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:28,613 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:28,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:28,815 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1978235584, now seen corresponding path program 4 times [2020-07-20 01:51:28,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:28,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616353948] [2020-07-20 01:51:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:28,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616353948] [2020-07-20 01:51:28,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354527721] [2020-07-20 01:51:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e2da9f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:28,954 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65e2da9f issued 2 check-sat command(s) [2020-07-20 01:51:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:51:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:29,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:29,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-20 01:51:29,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393564286] [2020-07-20 01:51:29,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:51:29,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:29,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:51:29,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:51:29,054 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 13 states. [2020-07-20 01:51:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:29,167 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 01:51:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:51:29,167 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-07-20 01:51:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:29,168 INFO L225 Difference]: With dead ends: 36 [2020-07-20 01:51:29,168 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:51:29,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:51:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:51:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 01:51:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 01:51:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-20 01:51:29,175 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2020-07-20 01:51:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:29,176 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-20 01:51:29,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:51:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-20 01:51:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 01:51:29,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:29,177 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:29,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:29,391 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:29,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:29,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1635814936, now seen corresponding path program 5 times [2020-07-20 01:51:29,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:29,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289353338] [2020-07-20 01:51:29,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:29,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289353338] [2020-07-20 01:51:29,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957958893] [2020-07-20 01:51:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14bb4c4a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:29,493 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14bb4c4a issued 2 check-sat command(s) [2020-07-20 01:51:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:29,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:51:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:29,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:29,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 01:51:29,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293059528] [2020-07-20 01:51:29,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:51:29,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:29,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:51:29,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:51:29,658 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 15 states. [2020-07-20 01:51:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:29,853 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-07-20 01:51:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:51:29,853 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-07-20 01:51:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:29,854 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:51:29,854 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 01:51:29,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:51:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 01:51:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 01:51:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 01:51:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-20 01:51:29,861 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 23 [2020-07-20 01:51:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:29,861 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-20 01:51:29,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:51:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-20 01:51:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 01:51:29,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:29,862 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:30,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:30,077 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash 389290560, now seen corresponding path program 6 times [2020-07-20 01:51:30,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:30,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652138326] [2020-07-20 01:51:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:30,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652138326] [2020-07-20 01:51:30,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111774298] [2020-07-20 01:51:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4835022b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-07-20 01:51:30,147 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4835022b issued 2 check-sat command(s) [2020-07-20 01:51:30,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:30,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:51:30,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:30,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 13 [2020-07-20 01:51:30,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526745076] [2020-07-20 01:51:30,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:51:30,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:51:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:51:30,267 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 13 states. [2020-07-20 01:51:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:30,474 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-07-20 01:51:30,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:51:30,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-07-20 01:51:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:30,475 INFO L225 Difference]: With dead ends: 42 [2020-07-20 01:51:30,475 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:51:30,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:51:30,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:51:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:51:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:51:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-20 01:51:30,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-20 01:51:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:30,487 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-20 01:51:30,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:51:30,487 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-20 01:51:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 01:51:30,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:30,488 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:30,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:30,689 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash -807358598, now seen corresponding path program 7 times [2020-07-20 01:51:30,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:30,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474741267] [2020-07-20 01:51:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 01:51:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474741267] [2020-07-20 01:51:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705604731] [2020-07-20 01:51:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22aa3707 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:30,759 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22aa3707 issued 2 check-sat command(s) [2020-07-20 01:51:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 01:51:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:51:30,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:30,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2020-07-20 01:51:30,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354445519] [2020-07-20 01:51:30,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:51:30,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:30,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:51:30,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:51:30,889 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 15 states. [2020-07-20 01:51:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:31,141 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-07-20 01:51:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:51:31,142 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-20 01:51:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:31,143 INFO L225 Difference]: With dead ends: 51 [2020-07-20 01:51:31,143 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 01:51:31,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:51:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 01:51:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 01:51:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 01:51:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-07-20 01:51:31,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 29 [2020-07-20 01:51:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:31,150 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-07-20 01:51:31,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:51:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-07-20 01:51:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 01:51:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:31,151 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:31,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 01:51:31,352 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -655531164, now seen corresponding path program 8 times [2020-07-20 01:51:31,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:31,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452855266] [2020-07-20 01:51:31,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:31,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452855266] [2020-07-20 01:51:31,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132108160] [2020-07-20 01:51:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25e10ce2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:31,538 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@25e10ce2 issued 2 check-sat command(s) [2020-07-20 01:51:31,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:51:31,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:31,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:31,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-20 01:51:31,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977542121] [2020-07-20 01:51:31,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 01:51:31,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 01:51:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-07-20 01:51:31,749 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 21 states. [2020-07-20 01:51:32,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:32,029 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-07-20 01:51:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:51:32,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-07-20 01:51:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:32,030 INFO L225 Difference]: With dead ends: 56 [2020-07-20 01:51:32,030 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 01:51:32,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:51:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 01:51:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 01:51:32,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:51:32,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-20 01:51:32,047 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 34 [2020-07-20 01:51:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:32,047 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-20 01:51:32,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 01:51:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-20 01:51:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 01:51:32,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:32,050 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:32,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-20 01:51:32,252 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash -514812916, now seen corresponding path program 9 times [2020-07-20 01:51:32,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:32,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808338345] [2020-07-20 01:51:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:32,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808338345] [2020-07-20 01:51:32,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361276139] [2020-07-20 01:51:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31aa73c1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:32,433 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@31aa73c1 issued 2 check-sat command(s) [2020-07-20 01:51:32,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 01:51:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:32,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:32,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-07-20 01:51:32,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854600161] [2020-07-20 01:51:32,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 01:51:32,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:32,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 01:51:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-07-20 01:51:32,699 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 23 states. [2020-07-20 01:51:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:33,003 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-07-20 01:51:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:51:33,004 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-07-20 01:51:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:33,005 INFO L225 Difference]: With dead ends: 57 [2020-07-20 01:51:33,005 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 01:51:33,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-07-20 01:51:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 01:51:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-20 01:51:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 01:51:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-20 01:51:33,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2020-07-20 01:51:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:33,012 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-20 01:51:33,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 01:51:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-20 01:51:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 01:51:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:33,013 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:33,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:33,220 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash -447514524, now seen corresponding path program 10 times [2020-07-20 01:51:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:33,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629928482] [2020-07-20 01:51:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:33,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629928482] [2020-07-20 01:51:33,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244415386] [2020-07-20 01:51:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@501654d0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:33,381 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@501654d0 issued 2 check-sat command(s) [2020-07-20 01:51:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:51:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:33,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:33,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-07-20 01:51:33,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316783496] [2020-07-20 01:51:33,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 01:51:33,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:33,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 01:51:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-07-20 01:51:33,685 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 25 states. [2020-07-20 01:51:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:34,038 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-20 01:51:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:51:34,039 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-07-20 01:51:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:34,040 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:51:34,040 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 01:51:34,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:51:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 01:51:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 01:51:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 01:51:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-20 01:51:34,046 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 36 [2020-07-20 01:51:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:34,047 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-20 01:51:34,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 01:51:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-20 01:51:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:51:34,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:34,048 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:34,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:34,250 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1638735628, now seen corresponding path program 11 times [2020-07-20 01:51:34,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:34,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253480396] [2020-07-20 01:51:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:34,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253480396] [2020-07-20 01:51:34,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113627865] [2020-07-20 01:51:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48524522 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:34,429 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@48524522 issued 2 check-sat command(s) [2020-07-20 01:51:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:34,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 01:51:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:34,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:34,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-20 01:51:34,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005485757] [2020-07-20 01:51:34,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 01:51:34,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 01:51:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-07-20 01:51:34,781 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 27 states. [2020-07-20 01:51:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:35,205 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-07-20 01:51:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:51:35,206 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-07-20 01:51:35,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:35,207 INFO L225 Difference]: With dead ends: 59 [2020-07-20 01:51:35,207 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:51:35,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 01:51:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:51:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 01:51:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:51:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-20 01:51:35,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2020-07-20 01:51:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:35,218 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-20 01:51:35,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 01:51:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-20 01:51:35,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 01:51:35,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:35,220 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:35,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:51:35,431 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1887980900, now seen corresponding path program 12 times [2020-07-20 01:51:35,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:35,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015608680] [2020-07-20 01:51:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 43 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015608680] [2020-07-20 01:51:35,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378496318] [2020-07-20 01:51:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d4371e7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:35,605 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3d4371e7 issued 2 check-sat command(s) [2020-07-20 01:51:35,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:51:35,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 43 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:35,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:35,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-07-20 01:51:35,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589401584] [2020-07-20 01:51:35,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 01:51:35,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 01:51:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2020-07-20 01:51:36,001 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 29 states. [2020-07-20 01:51:36,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:36,452 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-07-20 01:51:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:51:36,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-07-20 01:51:36,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:36,454 INFO L225 Difference]: With dead ends: 60 [2020-07-20 01:51:36,454 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 01:51:36,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:51:36,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 01:51:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 01:51:36,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 01:51:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-20 01:51:36,462 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 38 [2020-07-20 01:51:36,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:36,462 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-20 01:51:36,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 01:51:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-20 01:51:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 01:51:36,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:36,463 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:36,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 01:51:36,676 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:36,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1024649740, now seen corresponding path program 13 times [2020-07-20 01:51:36,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:36,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298246534] [2020-07-20 01:51:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 46 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:36,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298246534] [2020-07-20 01:51:36,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854194044] [2020-07-20 01:51:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59568c51 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:36,878 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@59568c51 issued 2 check-sat command(s) [2020-07-20 01:51:36,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 01:51:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 46 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:37,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:37,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-07-20 01:51:37,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568219340] [2020-07-20 01:51:37,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 01:51:37,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 01:51:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-07-20 01:51:37,302 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 31 states. [2020-07-20 01:51:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:37,833 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-07-20 01:51:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:51:37,836 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-07-20 01:51:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:37,837 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:51:37,837 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 01:51:37,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 01:51:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 01:51:37,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 01:51:37,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 01:51:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 01:51:37,845 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 39 [2020-07-20 01:51:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:37,845 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 01:51:37,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 01:51:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 01:51:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 01:51:37,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:37,847 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:38,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 01:51:38,048 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash 31187556, now seen corresponding path program 14 times [2020-07-20 01:51:38,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:38,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388283280] [2020-07-20 01:51:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:38,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388283280] [2020-07-20 01:51:38,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070772880] [2020-07-20 01:51:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ba79859 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:38,286 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ba79859 issued 3 check-sat command(s) [2020-07-20 01:51:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:51:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:38,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:38,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-07-20 01:51:38,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547961077] [2020-07-20 01:51:38,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 01:51:38,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:38,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 01:51:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 01:51:38,786 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 33 states. [2020-07-20 01:51:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:39,413 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-07-20 01:51:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:51:39,414 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-07-20 01:51:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:39,414 INFO L225 Difference]: With dead ends: 62 [2020-07-20 01:51:39,414 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 01:51:39,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=571, Invalid=1591, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 01:51:39,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 01:51:39,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 01:51:39,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:51:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-20 01:51:39,424 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 40 [2020-07-20 01:51:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:39,425 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-20 01:51:39,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 01:51:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-20 01:51:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 01:51:39,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:39,426 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:39,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:39,642 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 15 times [2020-07-20 01:51:39,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:39,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826658270] [2020-07-20 01:51:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:39,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826658270] [2020-07-20 01:51:39,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197639011] [2020-07-20 01:51:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10afc71e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:39,908 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@10afc71e issued 2 check-sat command(s) [2020-07-20 01:51:39,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 01:51:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:40,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:40,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2020-07-20 01:51:40,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474731777] [2020-07-20 01:51:40,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 01:51:40,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 01:51:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 01:51:40,454 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 35 states. [2020-07-20 01:51:41,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:41,133 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-07-20 01:51:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:51:41,134 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-07-20 01:51:41,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:41,135 INFO L225 Difference]: With dead ends: 63 [2020-07-20 01:51:41,135 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 01:51:41,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=641, Invalid=1809, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 01:51:41,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 01:51:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-20 01:51:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 01:51:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-20 01:51:41,152 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2020-07-20 01:51:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:41,153 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-20 01:51:41,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 01:51:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-20 01:51:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 01:51:41,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:41,154 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:41,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 01:51:41,370 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:41,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1935788188, now seen corresponding path program 16 times [2020-07-20 01:51:41,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:41,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177810295] [2020-07-20 01:51:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:41,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177810295] [2020-07-20 01:51:41,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83785302] [2020-07-20 01:51:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b454d0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:41,697 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@28b454d0 issued 3 check-sat command(s) [2020-07-20 01:51:41,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:41,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:51:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:42,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:42,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2020-07-20 01:51:42,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729459407] [2020-07-20 01:51:42,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-20 01:51:42,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:42,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-20 01:51:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 01:51:42,300 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 37 states. [2020-07-20 01:51:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:43,077 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-07-20 01:51:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 01:51:43,078 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-07-20 01:51:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:43,079 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:51:43,079 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 01:51:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=715, Invalid=2041, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 01:51:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 01:51:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 01:51:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 01:51:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-07-20 01:51:43,092 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2020-07-20 01:51:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:43,092 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-07-20 01:51:43,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-20 01:51:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-20 01:51:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:51:43,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:43,094 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:43,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:43,307 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1548074996, now seen corresponding path program 17 times [2020-07-20 01:51:43,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:43,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273173818] [2020-07-20 01:51:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 58 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:43,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273173818] [2020-07-20 01:51:43,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66461095] [2020-07-20 01:51:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ec8c78a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:43,685 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ec8c78a issued 3 check-sat command(s) [2020-07-20 01:51:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 01:51:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 58 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:44,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:44,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2020-07-20 01:51:44,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728512917] [2020-07-20 01:51:44,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-20 01:51:44,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-20 01:51:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 01:51:44,347 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 39 states. [2020-07-20 01:51:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:45,259 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-20 01:51:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 01:51:45,260 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-07-20 01:51:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:45,260 INFO L225 Difference]: With dead ends: 65 [2020-07-20 01:51:45,260 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 01:51:45,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=793, Invalid=2287, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 01:51:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 01:51:45,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 01:51:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:51:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-20 01:51:45,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 43 [2020-07-20 01:51:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:45,267 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-20 01:51:45,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-20 01:51:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-20 01:51:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 01:51:45,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:45,268 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:45,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:45,480 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1881099364, now seen corresponding path program 18 times [2020-07-20 01:51:45,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:45,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986400915] [2020-07-20 01:51:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 61 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:45,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986400915] [2020-07-20 01:51:45,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359852250] [2020-07-20 01:51:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dcb425c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:45,807 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7dcb425c issued 3 check-sat command(s) [2020-07-20 01:51:45,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:45,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:51:45,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 61 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:46,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:46,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2020-07-20 01:51:46,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52352558] [2020-07-20 01:51:46,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-20 01:51:46,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-20 01:51:46,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 01:51:46,556 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 41 states. [2020-07-20 01:51:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:47,512 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-07-20 01:51:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 01:51:47,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-07-20 01:51:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:47,515 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:51:47,515 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 01:51:47,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=875, Invalid=2547, Unknown=0, NotChecked=0, Total=3422 [2020-07-20 01:51:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 01:51:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-20 01:51:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 01:51:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-20 01:51:47,529 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 44 [2020-07-20 01:51:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:47,530 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-20 01:51:47,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-20 01:51:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-20 01:51:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 01:51:47,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:47,530 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:47,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-20 01:51:47,733 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:47,734 INFO L82 PathProgramCache]: Analyzing trace with hash 811322124, now seen corresponding path program 19 times [2020-07-20 01:51:47,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:47,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524517299] [2020-07-20 01:51:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 64 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:48,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524517299] [2020-07-20 01:51:48,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555448512] [2020-07-20 01:51:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44011ca3 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:48,141 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@44011ca3 issued 3 check-sat command(s) [2020-07-20 01:51:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 01:51:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 64 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:48,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:48,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2020-07-20 01:51:48,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790170647] [2020-07-20 01:51:48,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-20 01:51:48,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-20 01:51:48,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 01:51:48,922 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 43 states. [2020-07-20 01:51:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:49,965 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-20 01:51:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 01:51:49,968 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-07-20 01:51:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:49,969 INFO L225 Difference]: With dead ends: 67 [2020-07-20 01:51:49,969 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 01:51:49,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2020-07-20 01:51:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 01:51:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-20 01:51:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 01:51:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-20 01:51:49,974 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 45 [2020-07-20 01:51:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:49,975 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-20 01:51:49,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-20 01:51:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-20 01:51:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 01:51:49,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:49,976 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:50,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:50,178 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2007966052, now seen corresponding path program 20 times [2020-07-20 01:51:50,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:50,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062040593] [2020-07-20 01:51:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 67 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:50,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062040593] [2020-07-20 01:51:50,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585784003] [2020-07-20 01:51:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d03652a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:50,555 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d03652a issued 3 check-sat command(s) [2020-07-20 01:51:50,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:51:50,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 67 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:51,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:51,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2020-07-20 01:51:51,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965934072] [2020-07-20 01:51:51,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 01:51:51,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 01:51:51,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1639, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 01:51:51,478 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 45 states. [2020-07-20 01:51:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:52,684 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-20 01:51:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 01:51:52,686 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 46 [2020-07-20 01:51:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:52,687 INFO L225 Difference]: With dead ends: 68 [2020-07-20 01:51:52,687 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 01:51:52,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1051, Invalid=3109, Unknown=0, NotChecked=0, Total=4160 [2020-07-20 01:51:52,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 01:51:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 01:51:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:51:52,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-20 01:51:52,693 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 46 [2020-07-20 01:51:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:52,694 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-20 01:51:52,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 01:51:52,694 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-20 01:51:52,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 01:51:52,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:52,695 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:52,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-20 01:51:52,896 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:52,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash 449222156, now seen corresponding path program 21 times [2020-07-20 01:51:52,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:52,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168692814] [2020-07-20 01:51:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 70 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:53,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168692814] [2020-07-20 01:51:53,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20891801] [2020-07-20 01:51:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37344f28 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:51:53,307 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@37344f28 issued 3 check-sat command(s) [2020-07-20 01:51:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:51:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 01:51:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:51:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 70 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 01:51:54,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:51:54,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2020-07-20 01:51:54,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510285943] [2020-07-20 01:51:54,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-20 01:51:54,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-20 01:51:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 01:51:54,356 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 47 states. [2020-07-20 01:51:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:55,657 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-20 01:51:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 01:51:55,657 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2020-07-20 01:51:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:55,658 INFO L225 Difference]: With dead ends: 69 [2020-07-20 01:51:55,658 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 01:51:55,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1145, Invalid=3411, Unknown=0, NotChecked=0, Total=4556 [2020-07-20 01:51:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 01:51:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-20 01:51:55,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 01:51:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-20 01:51:55,665 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 47 [2020-07-20 01:51:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:55,666 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-20 01:51:55,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-20 01:51:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-20 01:51:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 01:51:55,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:51:55,667 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:51:55,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-20 01:51:55,871 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:51:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:51:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -627198364, now seen corresponding path program 22 times [2020-07-20 01:51:55,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:51:55,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103288965] [2020-07-20 01:51:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@236d612e [2020-07-20 01:51:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:51:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-07-20 01:51:55,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103288965] [2020-07-20 01:51:55,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:51:55,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:51:55,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978312638] [2020-07-20 01:51:55,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:51:55,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:51:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:51:55,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:51:55,920 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-07-20 01:51:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:51:55,941 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-07-20 01:51:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:51:55,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-20 01:51:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:51:55,942 INFO L225 Difference]: With dead ends: 66 [2020-07-20 01:51:55,942 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 01:51:55,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:51:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 01:51:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 01:51:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 01:51:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 01:51:55,943 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-07-20 01:51:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:51:55,944 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 01:51:55,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:51:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 01:51:55,944 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 01:51:55,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-20 01:51:55,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 01:51:56,083 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 01:51:56,083 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:51:56,084 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 01:51:56,084 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 01:51:56,084 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 01:51:56,084 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 01:51:56,084 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:56,084 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 01:51:56,084 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:56,085 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 01:51:56,085 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-20 01:51:56,085 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-20 01:51:56,085 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-20 01:51:56,085 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-20 01:51:56,085 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-20 01:51:56,086 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) (* 20 main_~i~0))) (= 4 main_~k~0)) [2020-07-20 01:51:56,086 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-20 01:51:56,086 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-20 01:51:56,086 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-20 01:51:56,086 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 01:51:56,086 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:51:56,086 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 01:51:56,086 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 01:51:56,086 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 01:51:56,087 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 01:51:56,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:51:56 BoogieIcfgContainer [2020-07-20 01:51:56,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:51:56,110 INFO L168 Benchmark]: Toolchain (without parser) took 30077.23 ms. Allocated memory was 145.8 MB in the beginning and 369.1 MB in the end (delta: 223.3 MB). Free memory was 103.8 MB in the beginning and 129.1 MB in the end (delta: -25.4 MB). Peak memory consumption was 198.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,111 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.13 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,112 INFO L168 Benchmark]: Boogie Preprocessor took 119.72 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 182.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,113 INFO L168 Benchmark]: RCFGBuilder took 238.07 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,113 INFO L168 Benchmark]: TraceAbstraction took 29424.74 ms. Allocated memory was 202.9 MB in the beginning and 369.1 MB in the end (delta: 166.2 MB). Free memory was 169.0 MB in the beginning and 129.1 MB in the end (delta: 39.9 MB). Peak memory consumption was 206.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:51:56,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.13 ms. Allocated memory is still 145.8 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.72 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 93.9 MB in the beginning and 182.9 MB in the end (delta: -89.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 238.07 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29424.74 ms. Allocated memory was 202.9 MB in the beginning and 369.1 MB in the end (delta: 166.2 MB). Free memory was 169.0 MB in the beginning and 129.1 MB in the end (delta: 39.9 MB). Peak memory consumption was 206.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 20 * i) || 4 == k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.2s, OverallIterations: 25, TraceHistogramMax: 22, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 362 SDtfs, 20 SDslu, 4415 SDs, 0 SdLazy, 1621 SolverSat, 514 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 528 SyntacticMatches, 18 SemanticMatches, 758 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6094 ImplicationChecksByTransitivity, 19.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 34 PreInvPairs, 70 NumberOfFragments, 33 HoareAnnotationTreeSize, 34 FomulaSimplifications, 1880 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 147 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 1524 NumberOfCodeBlocks, 1258 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1478 ConstructedInterpolants, 0 QuantifiedInterpolants, 215825 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1279 ConjunctsInSsa, 313 ConjunctsInUnsatCore, 46 InterpolantComputations, 4 PerfectInterpolantSequences, 2518/6052 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...