/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:31:41,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:31:41,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:31:41,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:31:41,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:31:41,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:31:41,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:31:41,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:31:41,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:31:41,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:31:41,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:31:41,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:31:41,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:31:42,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:31:42,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:31:42,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:31:42,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:31:42,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:31:42,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:31:42,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:31:42,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:31:42,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:31:42,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:31:42,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:31:42,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:31:42,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:31:42,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:31:42,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:31:42,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:31:42,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:31:42,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:31:42,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:31:42,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:31:42,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:31:42,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:31:42,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:31:42,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:31:42,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:31:42,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:31:42,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:31:42,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:31:42,050 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 [2021-05-02 15:31:42,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:31:42,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:31:42,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:31:42,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:31:42,092 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:31:42,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:31:42,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:31:42,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:31:42,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:31:42,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:31:42,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:31:42,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:31:42,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:31:42,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:31:42,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:31:42,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:31:42,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:31:42,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:31:42,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:31:42,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:31:42,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:31:42,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:31:42,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:31:42,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:31:42,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:31:42,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:31:42,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:31:42,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:31:42,421 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:31:42,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-02 15:31:42,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82b2de2e/6a4e2b98c9574751b4706a502c7ab473/FLAG23367a7f5 [2021-05-02 15:31:42,886 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:31:42,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c [2021-05-02 15:31:42,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82b2de2e/6a4e2b98c9574751b4706a502c7ab473/FLAG23367a7f5 [2021-05-02 15:31:42,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82b2de2e/6a4e2b98c9574751b4706a502c7ab473 [2021-05-02 15:31:42,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:31:42,910 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:31:42,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:42,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:31:42,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:31:42,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:42" (1/1) ... [2021-05-02 15:31:42,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78057844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:42, skipping insertion in model container [2021-05-02 15:31:42,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:31:42" (1/1) ... [2021-05-02 15:31:42,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:31:42,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:31:43,033 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-02 15:31:43,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:43,053 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:31:43,088 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound1.c[545,558] [2021-05-02 15:31:43,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:31:43,139 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:31:43,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43 WrapperNode [2021-05-02 15:31:43,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:31:43,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:31:43,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:31:43,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:31:43,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (1/1) ... [2021-05-02 15:31:43,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:31:43,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:31:43,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:31:43,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:31:43,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (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 [2021-05-02 15:31:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:31:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:31:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:31:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:31:43,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:31:43,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:31:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:31:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:31:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:31:43,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:31:43,560 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:31:43,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:43 BoogieIcfgContainer [2021-05-02 15:31:43,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:31:43,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:31:43,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:31:43,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:31:43,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:31:42" (1/3) ... [2021-05-02 15:31:43,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25aa6621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:43, skipping insertion in model container [2021-05-02 15:31:43,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:31:43" (2/3) ... [2021-05-02 15:31:43,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25aa6621 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:31:43, skipping insertion in model container [2021-05-02 15:31:43,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:31:43" (3/3) ... [2021-05-02 15:31:43,582 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound1.c [2021-05-02 15:31:43,586 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:31:43,589 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:31:43,621 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:31:43,648 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:31:43,649 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:31:43,649 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:31:43,649 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:31:43,649 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:31:43,649 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:31:43,649 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:31:43,650 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:31:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:31:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:31:43,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:43,672 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:43,673 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:31:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528984985] [2021-05-02 15:31:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:43,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:43,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:43,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:43,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:43,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:43,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528984985] [2021-05-02 15:31:43,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528984985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:43,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:43,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:31:43,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083011728] [2021-05-02 15:31:43,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:31:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:43,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:31:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:43,975 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:31:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:44,104 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:31:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:31:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:31:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:44,112 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:31:44,112 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:31:44,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:31:44,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:31:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:31:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:31:44,151 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:31:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:44,151 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:31:44,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:31:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:31:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:31:44,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:44,153 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:44,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:31:44,154 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:44,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:31:44,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:44,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014510625] [2021-05-02 15:31:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:44,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:44,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014510625] [2021-05-02 15:31:44,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014510625] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:44,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:44,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:44,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785059056] [2021-05-02 15:31:44,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:44,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:44,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:44,333 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:31:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:44,665 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:31:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:31:44,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:31:44,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:44,668 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:31:44,668 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:31:44,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:31:44,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:31:44,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:31:44,685 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:31:44,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:44,685 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:31:44,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:31:44,685 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:31:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:31:44,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:44,686 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:44,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:31:44,686 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:31:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:44,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661413752] [2021-05-02 15:31:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:31:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:31:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:31:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:31:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:31:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:31:44,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:44,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661413752] [2021-05-02 15:31:44,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661413752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:31:44,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:31:44,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:31:44,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350072796] [2021-05-02 15:31:44,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:31:44,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:31:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:31:44,956 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:31:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:45,270 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:31:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:31:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:31:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:45,275 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:31:45,275 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:31:45,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:31:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:31:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:31:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:31:45,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:31:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:45,299 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:31:45,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:31:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:31:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:31:45,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:45,300 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:45,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:31:45,301 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:31:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:45,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460693191] [2021-05-02 15:31:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:45,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:45,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136672545] [2021-05-02 15:31:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:31:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:31:45,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:45,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460693191] [2021-05-02 15:31:45,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:45,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136672545] [2021-05-02 15:31:45,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136672545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:45,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:45,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:31:45,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63854184] [2021-05-02 15:31:45,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:31:45,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:45,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:31:45,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:31:45,651 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:31:45,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:45,814 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:31:45,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:31:45,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 15:31:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:45,815 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:31:45,816 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:31:45,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:31:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:31:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:31:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:31:45,829 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:31:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:45,829 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:31:45,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:31:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:31:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:31:45,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:45,831 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:46,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:46,041 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:31:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310621020] [2021-05-02 15:31:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:46,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:46,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785479311] [2021-05-02 15:31:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:31:46,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:46,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:31:46,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310621020] [2021-05-02 15:31:46,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:46,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785479311] [2021-05-02 15:31:46,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785479311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:46,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:46,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:31:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277222252] [2021-05-02 15:31:46,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:31:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:31:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:46,373 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:31:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:46,555 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 15:31:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:31:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2021-05-02 15:31:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:46,559 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:31:46,560 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:31:46,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:31:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:31:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:31:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:31:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:31:46,579 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 15:31:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:46,579 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:31:46,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:31:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:31:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:31:46,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:46,587 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:46,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:46,793 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:46,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:31:46,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:46,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776349634] [2021-05-02 15:31:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:46,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:46,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537884076] [2021-05-02 15:31:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 15:31:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 15:31:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:46,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:46,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:31:47,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776349634] [2021-05-02 15:31:47,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537884076] [2021-05-02 15:31:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537884076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:47,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:47,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:31:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549650707] [2021-05-02 15:31:47,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:31:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:31:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:31:47,194 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:31:47,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:47,418 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2021-05-02 15:31:47,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:31:47,418 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:31:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:47,419 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:31:47,419 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 15:31:47,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:31:47,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 15:31:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 15:31:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:31:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-05-02 15:31:47,432 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 55 [2021-05-02 15:31:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:47,432 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-05-02 15:31:47,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:31:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-05-02 15:31:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:31:47,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:47,433 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:47,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:47,638 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:47,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-02 15:31:47,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:47,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862494292] [2021-05-02 15:31:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:47,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:47,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779643659] [2021-05-02 15:31:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 15:31:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 15:31:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:47,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 15:31:48,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:48,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862494292] [2021-05-02 15:31:48,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:48,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779643659] [2021-05-02 15:31:48,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779643659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:48,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:48,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:31:48,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869598801] [2021-05-02 15:31:48,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:31:48,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:31:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:31:48,127 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:31:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:48,301 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-05-02 15:31:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:31:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 62 [2021-05-02 15:31:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:48,303 INFO L225 Difference]: With dead ends: 84 [2021-05-02 15:31:48,303 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 15:31:48,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:31:48,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 15:31:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 15:31:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 15:31:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2021-05-02 15:31:48,315 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 62 [2021-05-02 15:31:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:48,316 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2021-05-02 15:31:48,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:31:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2021-05-02 15:31:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:31:48,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:48,317 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:48,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:48,533 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:31:48,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:48,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308864868] [2021-05-02 15:31:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:48,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:48,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154072292] [2021-05-02 15:31:48,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 15:31:48,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:31:48,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:31:48,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:31:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:48,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:48,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,352 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 16 [2021-05-02 15:31:49,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-05-02 15:31:49,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:31:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308864868] [2021-05-02 15:31:49,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:31:49,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154072292] [2021-05-02 15:31:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154072292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:31:49,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:31:49,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:31:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535174031] [2021-05-02 15:31:49,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:31:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:31:49,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:31:49,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:31:49,507 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:31:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:31:50,307 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-05-02 15:31:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:31:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 15:31:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:31:50,311 INFO L225 Difference]: With dead ends: 112 [2021-05-02 15:31:50,311 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 15:31:50,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:31:50,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 15:31:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-02 15:31:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:31:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-05-02 15:31:50,334 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 72 [2021-05-02 15:31:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:31:50,334 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-05-02 15:31:50,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:31:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-05-02 15:31:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:31:50,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:31:50,336 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:31:50,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:50,559 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:31:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:31:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:31:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:31:50,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982033733] [2021-05-02 15:31:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:31:50,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:31:50,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954468027] [2021-05-02 15:31:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:31:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:31:50,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 15:31:50,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:31:50,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:50,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:31:51,640 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-02 15:31:52,082 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-02 15:32:09,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:09,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:10,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:11,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:11,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:11,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:17,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:18,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:18,807 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 2286 DAG size of output: 2176