/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/geo2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:48:59,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:48:59,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:48:59,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:48:59,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:48:59,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:48:59,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:48:59,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:48:59,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:48:59,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:48:59,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:48:59,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:48:59,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:48:59,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:48:59,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:48:59,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:48:59,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:48:59,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:48:59,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:48:59,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:48:59,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:48:59,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:48:59,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:48:59,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:48:59,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:48:59,592 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:48:59,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:48:59,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:48:59,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:48:59,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:48:59,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:48:59,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:48:59,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:48:59,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:48:59,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:48:59,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:48:59,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:48:59,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:48:59,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:48:59,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:48:59,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:48:59,601 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 02:48:59,637 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:48:59,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:48:59,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:48:59,640 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:48:59,640 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:48:59,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:48:59,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:48:59,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:48:59,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:48:59,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:48:59,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:48:59,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:48:59,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:48:59,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:48:59,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:48:59,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:48:59,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:48:59,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:48:59,644 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:48:59,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:48:59,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:48:59,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:48:59,938 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:48:59,939 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:48:59,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2021-05-06 02:48:59,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e4758fb/9d4a2a2268d948e08bfca389b70a25a1/FLAG1034f68a4 [2021-05-06 02:49:00,453 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:49:00,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound50.c [2021-05-06 02:49:00,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e4758fb/9d4a2a2268d948e08bfca389b70a25a1/FLAG1034f68a4 [2021-05-06 02:49:00,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e4758fb/9d4a2a2268d948e08bfca389b70a25a1 [2021-05-06 02:49:00,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:49:00,485 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:49:00,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:00,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:49:00,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:49:00,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5c3163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00, skipping insertion in model container [2021-05-06 02:49:00,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:49:00,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:49:00,610 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/geo2-ll_unwindbound50.c[525,538] [2021-05-06 02:49:00,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:00,630 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:49:00,657 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/geo2-ll_unwindbound50.c[525,538] [2021-05-06 02:49:00,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:49:00,688 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:49:00,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00 WrapperNode [2021-05-06 02:49:00,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:49:00,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:49:00,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:49:00,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:49:00,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (1/1) ... [2021-05-06 02:49:00,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:49:00,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:49:00,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:49:00,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:49:00,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (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 02:49:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:49:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:49:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:49:00,810 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:49:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:49:00,811 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:49:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:49:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:49:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:49:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:49:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:49:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:49:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:49:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:49:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:49:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:49:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:49:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:49:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:49:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:49:01,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:49:01,084 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:49:01,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:01 BoogieIcfgContainer [2021-05-06 02:49:01,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:49:01,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:49:01,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:49:01,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:49:01,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:49:00" (1/3) ... [2021-05-06 02:49:01,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31493b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:01, skipping insertion in model container [2021-05-06 02:49:01,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:49:00" (2/3) ... [2021-05-06 02:49:01,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31493b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:49:01, skipping insertion in model container [2021-05-06 02:49:01,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:49:01" (3/3) ... [2021-05-06 02:49:01,107 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound50.c [2021-05-06 02:49:01,112 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:49:01,115 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:49:01,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:49:01,145 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:49:01,145 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:49:01,145 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:49:01,146 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:49:01,146 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:49:01,146 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:49:01,146 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:49:01,146 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:49:01,174 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 02:49:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:49:01,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:01,178 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:01,179 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 02:49:01,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:01,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889819157] [2021-05-06 02:49:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:01,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:49:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:01,449 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 02:49:01,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:01,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889819157] [2021-05-06 02:49:01,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889819157] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:01,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:01,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:49:01,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204788280] [2021-05-06 02:49:01,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:49:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:49:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:01,471 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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 02:49:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:01,544 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 02:49:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:49:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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 11 [2021-05-06 02:49:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:01,550 INFO L225 Difference]: With dead ends: 39 [2021-05-06 02:49:01,550 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 02:49:01,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:49:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 02:49:01,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 02:49:01,579 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 02:49:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 02:49:01,581 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 02:49:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:01,581 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 02:49:01,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 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 02:49:01,581 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 02:49:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:49:01,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:01,582 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:01,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:49:01,582 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 02:49:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:01,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499684605] [2021-05-06 02:49:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:01,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:01,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118538283] [2021-05-06 02:49:01,597 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 02:49:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:49:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:01,790 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 02:49:01,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:01,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499684605] [2021-05-06 02:49:01,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:01,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118538283] [2021-05-06 02:49:01,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118538283] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:01,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:01,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:49:01,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439180428] [2021-05-06 02:49:01,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:49:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:49:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:49:01,794 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 02:49:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:01,813 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 02:49:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:49:01,814 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 02:49:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:01,815 INFO L225 Difference]: With dead ends: 26 [2021-05-06 02:49:01,815 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:49:01,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:49:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:49:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 02:49:01,821 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 02:49:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 02:49:01,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 02:49:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:01,822 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 02:49:01,822 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 02:49:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 02:49:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:49:01,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:01,823 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:02,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:49:02,031 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:02,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:02,032 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 02:49:02,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:02,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741736662] [2021-05-06 02:49:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:02,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:02,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [905944879] [2021-05-06 02:49:02,053 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 02:49:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:49:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:02,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,236 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 02:49:02,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:02,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741736662] [2021-05-06 02:49:02,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:02,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905944879] [2021-05-06 02:49:02,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905944879] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:49:02,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:49:02,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:49:02,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065270751] [2021-05-06 02:49:02,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:49:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:49:02,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:49:02,244 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 02:49:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:02,314 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 02:49:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:49:02,314 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 02:49:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:02,315 INFO L225 Difference]: With dead ends: 28 [2021-05-06 02:49:02,315 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:49:02,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:49:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:49:02,320 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 02:49:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:49:02,321 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 02:49:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:02,321 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:49:02,321 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 02:49:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:49:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:49:02,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:02,322 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 02:49:02,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:02,553 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:02,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:02,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 02:49:02,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:02,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858165010] [2021-05-06 02:49:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:02,564 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:02,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323894772] [2021-05-06 02:49:02,564 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 02:49:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:49:02,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:02,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:02,691 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 02:49:02,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858165010] [2021-05-06 02:49:02,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323894772] [2021-05-06 02:49:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323894772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:02,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:02,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:49:02,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114323809] [2021-05-06 02:49:02,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:49:02,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:02,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:49:02,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:49:02,693 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 02:49:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:02,722 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 02:49:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:49:02,723 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 02:49:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:02,724 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:49:02,724 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:49:02,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:49:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 02:49:02,728 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 02:49:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 02:49:02,729 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 02:49:02,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:02,729 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 02:49:02,730 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 02:49:02,730 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 02:49:02,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:49:02,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:02,730 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:02,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:02,954 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 02:49:02,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:02,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702217030] [2021-05-06 02:49:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:02,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144210725] [2021-05-06 02:49:02,965 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 02:49:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:49:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:49:03,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:03,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,112 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 02:49:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702217030] [2021-05-06 02:49:03,113 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:03,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144210725] [2021-05-06 02:49:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144210725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:03,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:03,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:49:03,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662367822] [2021-05-06 02:49:03,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:49:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:03,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:49:03,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:03,115 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 02:49:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:03,185 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 02:49:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:49:03,186 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 02:49:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:03,188 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:49:03,188 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 02:49:03,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:49:03,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 02:49:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 02:49:03,199 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 02:49:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 02:49:03,204 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 02:49:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:03,204 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 02:49:03,204 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 02:49:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 02:49:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:49:03,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:03,207 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 02:49:03,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:03,417 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 02:49:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:03,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239708541] [2021-05-06 02:49:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:03,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:03,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704502194] [2021-05-06 02:49:03,427 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 [2021-05-06 02:49:03,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:49:03,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:03,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:49:03,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:03,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:03,583 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 02:49:03,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239708541] [2021-05-06 02:49:03,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704502194] [2021-05-06 02:49:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704502194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:49:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358817448] [2021-05-06 02:49:03,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:49:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:49:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:49:03,585 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 02:49:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:03,632 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 02:49:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:49:03,632 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 02:49:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:03,635 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:49:03,635 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:49:03,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:49:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:49:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:49:03,643 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 02:49:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 02:49:03,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 02:49:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:03,645 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 02:49:03,645 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 02:49:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 02:49:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:49:03,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:03,646 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:49:03,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:49:03,869 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 02:49:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:03,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887712940] [2021-05-06 02:49:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:03,878 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:03,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594038095] [2021-05-06 02:49:03,878 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 02:49:03,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:49:03,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:49:03,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:04,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:04,323 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 02:49:04,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887712940] [2021-05-06 02:49:04,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:04,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594038095] [2021-05-06 02:49:04,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594038095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:04,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:04,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:49:04,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49811571] [2021-05-06 02:49:04,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:49:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:49:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:49:04,325 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) 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 02:49:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:49:23,415 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 02:49:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:49:23,415 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), 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 02:49:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:49:23,416 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:49:23,416 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:49:23,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:49:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:49:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 02:49:23,421 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 02:49:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 02:49:23,422 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 02:49:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:49:23,422 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 02:49:23,422 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), 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 02:49:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 02:49:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:49:23,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:49:23,423 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 02:49:23,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:49:23,640 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:49:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:49:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 02:49:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:49:23,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106242427] [2021-05-06 02:49:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:49:23,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:49:23,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714680861] [2021-05-06 02:49:23,651 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 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 02:49:23,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:49:23,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:49:23,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:49:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:49:23,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:23,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:49:24,003 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 02:49:24,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:49:24,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106242427] [2021-05-06 02:49:24,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:49:24,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714680861] [2021-05-06 02:49:24,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714680861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:49:24,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:49:24,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:49:24,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743006679] [2021-05-06 02:49:24,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:49:24,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:49:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:49:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:49:24,005 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)