/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.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:47:55,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:47:55,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:47:55,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:47:55,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:47:55,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:47:55,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:47:55,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:47:55,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:47:55,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:47:55,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:47:55,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:47:55,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:47:55,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:47:55,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:47:55,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:47:55,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:47:55,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:47:55,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:47:55,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:47:55,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:47:55,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:47:55,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:47:55,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:47:55,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 21:47:55,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 21:47:55,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 21:47:55,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 21:47:55,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 21:47:55,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-19 21:47:55,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-19 21:47:55,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-19 21:47:55,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-19 21:47:55,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-19 21:47:55,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-19 21:47:55,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-19 21:47:55,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-19 21:47:55,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-19 21:47:55,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:47:55,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:47:55,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:47:55,924 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 [2020-07-19 21:47:55,962 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:47:55,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:47:55,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:47:55,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:47:55,966 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:47:55,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:47:55,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:47:55,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:47:55,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:47:55,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:47:55,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:47:55,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:47:55,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:47:55,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:47:55,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:47:55,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:47:55,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:47:55,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:47:55,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:47:55,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:47:55,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:47:55,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:47:55,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:47:55,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:47:55,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:47:55,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:47:55,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:47:55,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:47:55,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:47:55,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:47:56,268 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:47:56,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:47:56,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:47:56,287 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:47:56,288 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:47:56,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-19 21:47:56,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5d7180/c77e30a83a27419f84465d57460bc272/FLAGbd75e4048 [2020-07-19 21:47:56,831 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:47:56,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-19 21:47:56,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5d7180/c77e30a83a27419f84465d57460bc272/FLAGbd75e4048 [2020-07-19 21:47:57,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cd5d7180/c77e30a83a27419f84465d57460bc272 [2020-07-19 21:47:57,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:47:57,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:47:57,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:57,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:47:57,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:47:57,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a36dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57, skipping insertion in model container [2020-07-19 21:47:57,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:47:57,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:47:57,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:57,387 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:47:57,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:57,416 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:47:57,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57 WrapperNode [2020-07-19 21:47:57,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:57,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:47:57,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:47:57,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:47:57,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (1/1) ... [2020-07-19 21:47:57,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:47:57,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:47:57,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:47:57,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:47:57,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (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 [2020-07-19 21:47:57,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:47:57,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:47:57,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:47:57,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:47:57,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:47:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:47:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:47:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:47:57,597 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:47:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:47:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:47:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:47:57,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:47:57,798 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:47:57,799 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-19 21:47:57,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:57 BoogieIcfgContainer [2020-07-19 21:47:57,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:47:57,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:47:57,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:47:57,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:47:57,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:47:57" (1/3) ... [2020-07-19 21:47:57,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75195bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:57, skipping insertion in model container [2020-07-19 21:47:57,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:57" (2/3) ... [2020-07-19 21:47:57,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75195bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:57, skipping insertion in model container [2020-07-19 21:47:57,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:57" (3/3) ... [2020-07-19 21:47:57,819 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-19 21:47:57,829 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:47:57,837 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:47:57,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:47:57,876 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:47:57,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:47:57,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:47:57,877 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:47:57,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:47:57,877 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:47:57,877 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:47:57,877 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:47:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 21:47:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:47:57,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:57,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:57,902 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-19 21:47:57,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:57,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95897725] [2020-07-19 21:47:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:47:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:58,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95897725] [2020-07-19 21:47:58,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:58,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:47:58,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400296615] [2020-07-19 21:47:58,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:47:58,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:47:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:47:58,063 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-19 21:47:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:58,090 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-19 21:47:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:47:58,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 21:47:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:58,101 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:47:58,102 INFO L226 Difference]: Without dead ends: 15 [2020-07-19 21:47:58,106 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 [2020-07-19 21:47:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-19 21:47:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-19 21:47:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 21:47:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-19 21:47:58,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-19 21:47:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:58,151 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-19 21:47:58,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:47:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-19 21:47:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:47:58,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:58,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:58,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:47:58,153 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-19 21:47:58,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:58,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814586726] [2020-07-19 21:47:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:47:58,165 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:47:58,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975343854] [2020-07-19 21:47:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 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 [2020-07-19 21:47:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:58,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:47:58,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:58,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814586726] [2020-07-19 21:47:58,444 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:47:58,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975343854] [2020-07-19 21:47:58,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:58,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:47:58,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690166531] [2020-07-19 21:47:58,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:47:58,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:58,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:47:58,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:47:58,449 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-19 21:47:58,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:58,543 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-19 21:47:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:47:58,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-19 21:47:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:58,547 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:47:58,547 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 21:47:58,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:47:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 21:47:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-19 21:47:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 21:47:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-19 21:47:58,557 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-19 21:47:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:58,557 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-19 21:47:58,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:47:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-19 21:47:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:47:58,559 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:58,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:58,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 21:47:58,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-19 21:47:58,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713033313] [2020-07-19 21:47:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:47:58,784 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:47:58,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840538104] [2020-07-19 21:47:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 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 [2020-07-19 21:47:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:47:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:58,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713033313] [2020-07-19 21:47:58,925 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:47:58,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840538104] [2020-07-19 21:47:58,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:47:58,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-19 21:47:58,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260908228] [2020-07-19 21:47:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:47:58,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:47:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:47:58,927 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-19 21:48:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:04,870 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-19 21:48:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:48:04,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-19 21:48:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:04,875 INFO L225 Difference]: With dead ends: 32 [2020-07-19 21:48:04,876 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:48:04,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:48:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:48:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-19 21:48:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-19 21:48:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-19 21:48:04,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-19 21:48:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:04,886 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-19 21:48:04,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:48:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-19 21:48:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 21:48:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:04,888 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:05,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:05,103 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-19 21:48:05,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:05,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914558388] [2020-07-19 21:48:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:48:05,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:05,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767154387] [2020-07-19 21:48:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:05,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:48:05,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:07,245 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:48:07,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:48:07,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914558388] [2020-07-19 21:48:07,346 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:48:07,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767154387] [2020-07-19 21:48:07,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:48:07,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-19 21:48:07,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379693708] [2020-07-19 21:48:07,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:48:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:48:07,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:48:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2020-07-19 21:48:07,349 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-07-19 21:48:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:48:09,586 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-19 21:48:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:48:09,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-07-19 21:48:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:48:09,591 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:48:09,591 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 21:48:09,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2020-07-19 21:48:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 21:48:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 21:48:09,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:48:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-19 21:48:09,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-19 21:48:09,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:48:09,599 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-19 21:48:09,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:48:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-19 21:48:09,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:48:09,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:48:09,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:48:09,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:48:09,816 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:48:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:48:09,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-19 21:48:09,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:48:09,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347630986] [2020-07-19 21:48:09,819 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:48:09,826 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:48:09,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768435013] [2020-07-19 21:48:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 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 [2020-07-19 21:48:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:48:09,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:48:09,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:48:10,180 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-19 21:48:10,194 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:48:30,007 WARN L193 SmtUtils]: Spent 12.36 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-19 21:48:30,012 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:48:52,812 WARN L193 SmtUtils]: Spent 12.54 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-19 21:48:54,856 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-19 21:49:03,139 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_12 Int) (v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int)) (let ((.cse0 (* v_main_~x~0_12 v_main_~z~0_BEFORE_CALL_5))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~x~0_12 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5)))) (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_12) (+ .cse0 v_main_~a~0_BEFORE_CALL_5))))) is different from false [2020-07-19 21:49:05,188 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_12 Int) (v_main_~a~0_BEFORE_CALL_5 Int) (v_main_~z~0_BEFORE_CALL_5 Int)) (let ((.cse0 (* v_main_~x~0_12 v_main_~z~0_BEFORE_CALL_5))) (and (not (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) .cse0) (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) (* v_main_~x~0_12 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5)))) (= (+ (* v_main_~a~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5 v_main_~z~0_BEFORE_CALL_5) v_main_~x~0_12) (+ .cse0 v_main_~a~0_BEFORE_CALL_5))))) is different from true [2020-07-19 21:49:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:49:05,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347630986] [2020-07-19 21:49:05,196 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-19 21:49:05,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768435013] [2020-07-19 21:49:05,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-19 21:49:05,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-19 21:49:05,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127553340] [2020-07-19 21:49:05,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:49:05,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:49:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:49:05,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=71, Unknown=3, NotChecked=16, Total=110 [2020-07-19 21:49:05,201 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-07-19 21:50:14,173 WARN L193 SmtUtils]: Spent 49.26 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2020-07-19 21:50:24,481 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 33 DAG size of output: 6 [2020-07-19 21:50:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:50:24,995 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-19 21:50:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:50:24,996 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-07-19 21:50:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:50:25,000 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:50:25,000 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:50:25,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.8s TimeCoverageRelationStatistics Valid=37, Invalid=117, Unknown=6, NotChecked=22, Total=182 [2020-07-19 21:50:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:50:25,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-19 21:50:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-19 21:50:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-19 21:50:25,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-19 21:50:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:50:25,009 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-19 21:50:25,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:50:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-19 21:50:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 21:50:25,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:50:25,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:50:25,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:50:25,220 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:50:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:50:25,220 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-19 21:50:25,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:50:25,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678113978] [2020-07-19 21:50:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 [2020-07-19 21:50:25,235 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-19 21:50:25,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395831304] [2020-07-19 21:50:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@db532 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