/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/geo3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:54:43,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:54:43,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:54:43,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:54:43,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:54:43,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:54:43,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:54:43,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:54:43,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:54:43,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:54:43,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:54:43,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:54:43,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:54:43,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:54:43,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:54:43,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:54:43,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:54:43,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:54:43,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:54:43,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:54:43,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:54:43,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:54:43,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:54:43,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:54:43,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:54:43,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:54:43,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:54:43,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:54:43,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:54:43,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:54:43,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:54:43,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:54:43,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:54:43,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:54:43,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:54:43,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:54:43,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:54:43,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:54:43,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:54:43,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:54:43,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:54:43,517 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 [2021-05-06 02:54:43,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:54:43,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:54:43,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:54:43,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:54:43,540 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:54:43,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:54:43,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:54:43,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:54:43,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:54:43,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:54:43,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:54:43,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:54:43,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:54:43,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:54:43,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:54:43,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:54:43,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:54:43,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:54:43,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:54:43,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:54:43,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:54:43,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:54:43,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:54:43,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:54:43,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:54:43,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:54:43,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:54:43,825 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:54:43,826 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-06 02:54:43,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1776200eb/2d537502ec9742d0957c0928bd230c12/FLAGa5179c41a [2021-05-06 02:54:44,236 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:54:44,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-06 02:54:44,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1776200eb/2d537502ec9742d0957c0928bd230c12/FLAGa5179c41a [2021-05-06 02:54:44,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1776200eb/2d537502ec9742d0957c0928bd230c12 [2021-05-06 02:54:44,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:54:44,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:54:44,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:54:44,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:54:44,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:54:44,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15b4aedb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44, skipping insertion in model container [2021-05-06 02:54:44,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:54:44,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:54:44,777 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/geo3-ll_unwindbound10.c[525,538] [2021-05-06 02:54:44,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:54:44,790 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:54:44,798 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/geo3-ll_unwindbound10.c[525,538] [2021-05-06 02:54:44,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:54:44,818 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:54:44,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44 WrapperNode [2021-05-06 02:54:44,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:54:44,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:54:44,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:54:44,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:54:44,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... [2021-05-06 02:54:44,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:54:44,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:54:44,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:54:44,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:54:44,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:54:44,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:54:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:54:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:54:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:54:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:54:44,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:54:44,904 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:54:44,905 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:54:44,905 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:54:44,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:54:44,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:54:44,905 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:54:44,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:54:45,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:54:45,071 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:54:45,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:54:45 BoogieIcfgContainer [2021-05-06 02:54:45,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:54:45,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:54:45,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:54:45,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:54:45,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:54:44" (1/3) ... [2021-05-06 02:54:45,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a90c168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:54:45, skipping insertion in model container [2021-05-06 02:54:45,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:54:44" (2/3) ... [2021-05-06 02:54:45,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a90c168 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:54:45, skipping insertion in model container [2021-05-06 02:54:45,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:54:45" (3/3) ... [2021-05-06 02:54:45,077 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.c [2021-05-06 02:54:45,089 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:54:45,091 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:54:45,103 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:54:45,117 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:54:45,117 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:54:45,117 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:54:45,117 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:54:45,117 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:54:45,117 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:54:45,117 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:54:45,118 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:54:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:54:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:54:45,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:45,130 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:45,131 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 02:54:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:45,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428658669] [2021-05-06 02:54:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:45,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:45,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420649370] [2021-05-06 02:54:45,232 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 [2021-05-06 02:54:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:54:45,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 02:54:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:45,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428658669] [2021-05-06 02:54:45,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:45,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420649370] [2021-05-06 02:54:45,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420649370] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:54:45,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:54:45,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 02:54:45,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976582645] [2021-05-06 02:54:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 02:54:45,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:45,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 02:54:45,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 02:54:45,398 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:45,419 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 02:54:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 02:54:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 02:54:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:45,427 INFO L225 Difference]: With dead ends: 38 [2021-05-06 02:54:45,427 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 02:54:45,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 02:54:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 02:54:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 02:54:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 02:54:45,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 02:54:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:45,455 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 02:54:45,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:45,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 02:54:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:54:45,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:45,457 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:45,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 02:54:45,673 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:45,674 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 02:54:45,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:45,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856277934] [2021-05-06 02:54:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:45,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:45,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258424532] [2021-05-06 02:54:45,696 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 [2021-05-06 02:54:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:54:45,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:54:45,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:45,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:45,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:45,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:45,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:45,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:45,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856277934] [2021-05-06 02:54:45,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:45,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258424532] [2021-05-06 02:54:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258424532] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:54:45,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:54:45,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:54:45,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298465433] [2021-05-06 02:54:45,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:54:45,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:54:45,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:54:45,890 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:45,904 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 02:54:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:54:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:54:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:45,907 INFO L225 Difference]: With dead ends: 26 [2021-05-06 02:54:45,908 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:54:45,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:54:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:54:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 02:54:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 02:54:45,916 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 02:54:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:45,917 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 02:54:45,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:45,921 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 02:54:45,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:54:45,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:45,921 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:46,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:46,133 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 02:54:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:46,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991351523] [2021-05-06 02:54:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:46,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:46,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649185070] [2021-05-06 02:54:46,143 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 [2021-05-06 02:54:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:54:46,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:54:46,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:46,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991351523] [2021-05-06 02:54:46,239 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:46,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649185070] [2021-05-06 02:54:46,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649185070] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:54:46,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:54:46,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:54:46,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340043613] [2021-05-06 02:54:46,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:54:46,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:54:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:54:46,240 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:46,265 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 02:54:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:54:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:54:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:46,266 INFO L225 Difference]: With dead ends: 28 [2021-05-06 02:54:46,266 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:54:46,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:54:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:54:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:54:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:54:46,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 02:54:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:46,270 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:54:46,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:54:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:54:46,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:54:46,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:46,271 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:46,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:46,493 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 02:54:46,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:46,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683604436] [2021-05-06 02:54:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:46,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:46,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917982044] [2021-05-06 02:54:46,514 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 [2021-05-06 02:54:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:54:46,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:54:46,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:46,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:46,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683604436] [2021-05-06 02:54:46,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:46,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917982044] [2021-05-06 02:54:46,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917982044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:54:46,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:54:46,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:54:46,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909489289] [2021-05-06 02:54:46,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:54:46,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:54:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:54:46,629 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:46,654 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 02:54:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:54:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:54:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:46,655 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:54:46,655 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:54:46,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:54:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:54:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 02:54:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 02:54:46,666 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 02:54:46,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:46,666 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 02:54:46,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:46,667 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 02:54:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:54:46,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:46,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:46,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:46,887 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:46,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 02:54:46,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:46,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317658949] [2021-05-06 02:54:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:46,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322251290] [2021-05-06 02:54:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 02:54:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:54:46,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:54:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:47,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:47,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:47,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317658949] [2021-05-06 02:54:47,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:47,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322251290] [2021-05-06 02:54:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322251290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:54:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:54:47,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:54:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148887879] [2021-05-06 02:54:47,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:54:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:54:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:54:47,053 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:47,094 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 02:54:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:54:47,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:54:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:47,096 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:54:47,096 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 02:54:47,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:54:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 02:54:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 02:54:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:54:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 02:54:47,112 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 02:54:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:47,112 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 02:54:47,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:54:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 02:54:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:54:47,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:47,114 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:47,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:47,329 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 02:54:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:47,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770505992] [2021-05-06 02:54:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:47,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:47,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348724742] [2021-05-06 02:54:47,337 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 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 [2021-05-06 02:54:47,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:54:47,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:54:47,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:54:47,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:47,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:54:47,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770505992] [2021-05-06 02:54:47,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:47,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348724742] [2021-05-06 02:54:47,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348724742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:54:47,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:54:47,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:54:47,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753727464] [2021-05-06 02:54:47,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:54:47,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:47,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:54:47,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:54:47,447 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:47,478 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 02:54:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:54:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:54:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:47,479 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:54:47,479 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:54:47,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:54:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:54:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:54:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:54:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 02:54:47,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 02:54:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:47,483 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 02:54:47,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 02:54:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:54:47,484 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:47,484 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:47,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:47,689 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 02:54:47,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:47,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086671736] [2021-05-06 02:54:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:47,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:47,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480628268] [2021-05-06 02:54:47,696 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:47,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:54:47,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:54:47,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:54:47,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:47,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:54:47,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:47,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086671736] [2021-05-06 02:54:47,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:47,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480628268] [2021-05-06 02:54:47,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480628268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:54:47,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:54:47,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:54:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458569908] [2021-05-06 02:54:47,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:54:47,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:47,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:54:47,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:54:47,909 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:48,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:54:48,123 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 02:54:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:54:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:54:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:54:48,124 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:54:48,124 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:54:48,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:54:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:54:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 02:54:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:54:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 02:54:48,128 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 02:54:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:54:48,128 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 02:54:48,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:54:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 02:54:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:54:48,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:54:48,129 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:54:48,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:48,333 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:54:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:54:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 02:54:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:54:48,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938740207] [2021-05-06 02:54:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:54:48,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:54:48,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155343403] [2021-05-06 02:54:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:54:48,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:54:48,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:54:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:54:48,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:54:48,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:48,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:49,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:49,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:54:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:54:49,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:54:49,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938740207] [2021-05-06 02:54:49,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:54:49,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155343403] [2021-05-06 02:54:49,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155343403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:54:49,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:54:49,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:54:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680868415] [2021-05-06 02:54:49,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:54:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:54:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:54:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:54:49,646 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)