/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/cohendiv-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:40:00,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:40:00,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:40:00,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 01:40:00,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 01:40:00,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 01:40:00,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 01:40:00,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 01:40:00,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 01:40:00,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 01:40:00,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 01:40:00,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 01:40:00,393 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:40:00,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:40:00,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:40:00,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:40:00,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:40:00,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:40:00,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:40:00,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:40:00,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:40:00,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:40:00,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:40:00,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:40:00,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 01:40:00,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 01:40:00,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 01:40:00,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 01:40:00,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 01:40:00,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 01:40:00,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 01:40:00,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 01:40:00,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 01:40:00,424 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 01:40:00,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 01:40:00,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 01:40:00,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 01:40:00,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 01:40:00,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:40:00,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:40:00,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:40:00,430 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 01:40:00,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:40:00,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:40:00,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:40:00,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:40:00,483 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:40:00,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:40:00,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:40:00,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:40:00,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:40:00,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:40:00,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:40:00,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:40:00,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:40:00,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:40:00,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:40:00,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:40:00,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:40:00,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:40:00,762 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:40:00,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-06 01:40:00,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc7a435/961d2a20b3cf4a24a7c78be9d6e4137b/FLAGd4575fc16 [2021-05-06 01:40:01,163 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:40:01,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-06 01:40:01,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc7a435/961d2a20b3cf4a24a7c78be9d6e4137b/FLAGd4575fc16 [2021-05-06 01:40:01,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc7a435/961d2a20b3cf4a24a7c78be9d6e4137b [2021-05-06 01:40:01,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:40:01,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:40:01,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:40:01,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:40:01,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:40:01,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cab255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01, skipping insertion in model container [2021-05-06 01:40:01,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:40:01,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:40:01,292 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-06 01:40:01,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:40:01,308 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:40:01,352 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-06 01:40:01,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:40:01,379 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:40:01,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01 WrapperNode [2021-05-06 01:40:01,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:40:01,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:40:01,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:40:01,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:40:01,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (1/1) ... [2021-05-06 01:40:01,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:40:01,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:40:01,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:40:01,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:40:01,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (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 01:40:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:40:01,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:40:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:40:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:40:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:40:01,470 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:40:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:40:01,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:40:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:40:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:40:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:40:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:40:01,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:40:01,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:40:01,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:40:01,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:40:01,784 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 01:40:01,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:40:01 BoogieIcfgContainer [2021-05-06 01:40:01,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:40:01,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:40:01,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:40:01,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:40:01,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:40:01" (1/3) ... [2021-05-06 01:40:01,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a63aa6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:40:01, skipping insertion in model container [2021-05-06 01:40:01,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:40:01" (2/3) ... [2021-05-06 01:40:01,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a63aa6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:40:01, skipping insertion in model container [2021-05-06 01:40:01,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:40:01" (3/3) ... [2021-05-06 01:40:01,793 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.c [2021-05-06 01:40:01,797 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:40:01,800 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:40:01,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:40:01,840 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:40:01,841 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:40:01,841 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:40:01,841 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:40:01,841 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:40:01,841 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:40:01,841 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:40:01,841 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:40:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 01:40:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 01:40:01,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:01,861 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:01,862 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:01,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:01,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-06 01:40:01,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:01,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115835935] [2021-05-06 01:40:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:02,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:40:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:02,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:40:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:02,131 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 01:40:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115835935] [2021-05-06 01:40:02,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115835935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:02,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:02,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:40:02,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840930673] [2021-05-06 01:40:02,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:40:02,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:02,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:40:02,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:40:02,147 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:40:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:02,342 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-06 01:40:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:40:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 01:40:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:02,351 INFO L225 Difference]: With dead ends: 68 [2021-05-06 01:40:02,351 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 01:40:02,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:40:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 01:40:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 01:40:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 01:40:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 01:40:02,406 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 01:40:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:02,407 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 01:40:02,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:40:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 01:40:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:40:02,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:02,408 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:02,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:40:02,408 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-06 01:40:02,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:02,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529989766] [2021-05-06 01:40:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:02,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:02,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638594177] [2021-05-06 01:40:02,447 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 01:40:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 01:40:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:02,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:02,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:02,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:02,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:02,653 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 01:40:02,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529989766] [2021-05-06 01:40:02,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:02,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638594177] [2021-05-06 01:40:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638594177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:02,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 01:40:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515685091] [2021-05-06 01:40:02,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 01:40:02,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:02,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 01:40:02,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 01:40:02,657 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:40:02,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:02,676 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 01:40:02,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 01:40:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 01:40:02,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:02,680 INFO L225 Difference]: With dead ends: 42 [2021-05-06 01:40:02,680 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:40:02,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 01:40:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:40:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 01:40:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 01:40:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 01:40:02,687 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 01:40:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:02,687 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 01:40:02,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:40:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 01:40:02,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:40:02,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:02,688 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:02,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:40:02,897 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-06 01:40:02,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:02,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442197029] [2021-05-06 01:40:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:02,910 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:02,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826252365] [2021-05-06 01:40:02,910 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 01:40:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:40:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:03,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,051 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 01:40:03,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442197029] [2021-05-06 01:40:03,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:03,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826252365] [2021-05-06 01:40:03,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826252365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:03,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:03,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:40:03,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883651487] [2021-05-06 01:40:03,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:03,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:03,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:03,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:03,053 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:40:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:03,189 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 01:40:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:40:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 01:40:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:03,190 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:40:03,190 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 01:40:03,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:03,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 01:40:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 01:40:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 01:40:03,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 01:40:03,198 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 01:40:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:03,199 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 01:40:03,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:40:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 01:40:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:40:03,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:03,199 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:03,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:03,413 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-06 01:40:03,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:03,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782316212] [2021-05-06 01:40:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:03,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:03,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686758716] [2021-05-06 01:40:03,423 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 01:40:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:40:03,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:03,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:40:03,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782316212] [2021-05-06 01:40:03,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:03,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686758716] [2021-05-06 01:40:03,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686758716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:03,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:03,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:40:03,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474172897] [2021-05-06 01:40:03,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:03,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:03,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:03,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:03,628 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:40:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:03,734 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 01:40:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:40:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 01:40:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:03,738 INFO L225 Difference]: With dead ends: 58 [2021-05-06 01:40:03,738 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 01:40:03,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 01:40:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 01:40:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 01:40:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 01:40:03,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 01:40:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:03,765 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 01:40:03,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:40:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 01:40:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 01:40:03,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:03,766 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:03,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:03,967 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-06 01:40:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:03,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735966528] [2021-05-06 01:40:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:03,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:03,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751810260] [2021-05-06 01:40:03,984 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 01:40:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:04,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:40:04,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:04,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:40:04,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:04,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735966528] [2021-05-06 01:40:04,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:04,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751810260] [2021-05-06 01:40:04,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751810260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:04,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:04,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:40:04,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659138317] [2021-05-06 01:40:04,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:40:04,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:04,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:40:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:40:04,128 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 01:40:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:04,192 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-06 01:40:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:40:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-05-06 01:40:04,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:04,194 INFO L225 Difference]: With dead ends: 83 [2021-05-06 01:40:04,194 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 01:40:04,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:40:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 01:40:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-06 01:40:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:40:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-06 01:40:04,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-06 01:40:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:04,202 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-06 01:40:04,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 01:40:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-06 01:40:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 01:40:04,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:04,203 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:04,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:04,425 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-06 01:40:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:04,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553604211] [2021-05-06 01:40:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:04,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:04,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74473134] [2021-05-06 01:40:04,434 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 01:40:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:40:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:04,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:40:04,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:04,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553604211] [2021-05-06 01:40:04,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:04,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74473134] [2021-05-06 01:40:04,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74473134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:04,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:04,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:40:04,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290541996] [2021-05-06 01:40:04,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:40:04,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:04,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:40:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:40:04,724 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 01:40:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:04,770 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-06 01:40:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:40:04,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 01:40:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:04,777 INFO L225 Difference]: With dead ends: 113 [2021-05-06 01:40:04,777 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 01:40:04,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:40:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 01:40:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 01:40:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:40:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-06 01:40:04,795 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-06 01:40:04,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:04,796 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-06 01:40:04,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 01:40:04,796 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-06 01:40:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 01:40:04,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:04,797 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:05,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 01:40:05,001 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:05,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-06 01:40:05,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:05,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510519197] [2021-05-06 01:40:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:05,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:05,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975856270] [2021-05-06 01:40:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:40:05,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 01:40:05,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:05,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510519197] [2021-05-06 01:40:05,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:05,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975856270] [2021-05-06 01:40:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975856270] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:05,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:40:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536140518] [2021-05-06 01:40:05,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:05,274 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 01:40:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:05,356 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-06 01:40:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:40:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 01:40:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:05,357 INFO L225 Difference]: With dead ends: 84 [2021-05-06 01:40:05,357 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 01:40:05,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:40:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 01:40:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 01:40:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:40:05,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-06 01:40:05,366 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-06 01:40:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:05,366 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-06 01:40:05,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 01:40:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-06 01:40:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 01:40:05,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:05,367 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:05,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:05,568 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:05,570 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-06 01:40:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:05,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078420336] [2021-05-06 01:40:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:05,599 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:05,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351693983] [2021-05-06 01:40:05,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:40:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:05,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:40:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:05,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 01:40:05,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:05,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078420336] [2021-05-06 01:40:05,765 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:05,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351693983] [2021-05-06 01:40:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351693983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:05,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:05,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:40:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626427093] [2021-05-06 01:40:05,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:05,767 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 01:40:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:05,890 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-06 01:40:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:40:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 01:40:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:05,894 INFO L225 Difference]: With dead ends: 88 [2021-05-06 01:40:05,895 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 01:40:05,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:40:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 01:40:05,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 01:40:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:40:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-06 01:40:05,905 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-06 01:40:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:05,905 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-06 01:40:05,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 01:40:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-06 01:40:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 01:40:05,906 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:05,906 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:06,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:06,113 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:06,114 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-06 01:40:06,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:06,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144663934] [2021-05-06 01:40:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:06,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:06,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431847935] [2021-05-06 01:40:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:40:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:40:06,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:06,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 01:40:06,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:06,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144663934] [2021-05-06 01:40:06,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:06,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431847935] [2021-05-06 01:40:06,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431847935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:06,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:06,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:40:06,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163188707] [2021-05-06 01:40:06,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:40:06,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:06,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:40:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:40:06,438 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 01:40:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:06,523 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2021-05-06 01:40:06,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:40:06,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 01:40:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:06,527 INFO L225 Difference]: With dead ends: 115 [2021-05-06 01:40:06,527 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 01:40:06,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:06,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 01:40:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-06 01:40:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 01:40:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-06 01:40:06,547 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-06 01:40:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:06,547 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-06 01:40:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 01:40:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-06 01:40:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 01:40:06,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:06,553 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:06,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 01:40:06,769 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2021-05-06 01:40:06,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:06,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141528874] [2021-05-06 01:40:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:06,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:06,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1906564806] [2021-05-06 01:40:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:06,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 01:40:06,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:07,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 01:40:07,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:07,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141528874] [2021-05-06 01:40:07,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:07,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906564806] [2021-05-06 01:40:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906564806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:07,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:07,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:40:07,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437578827] [2021-05-06 01:40:07,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:40:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:40:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:07,114 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:40:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:07,286 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2021-05-06 01:40:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:40:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-06 01:40:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:07,290 INFO L225 Difference]: With dead ends: 134 [2021-05-06 01:40:07,290 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 01:40:07,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 01:40:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-05-06 01:40:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 states have internal predecessors, (94), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 01:40:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2021-05-06 01:40:07,300 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 55 [2021-05-06 01:40:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:07,300 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2021-05-06 01:40:07,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:40:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2021-05-06 01:40:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 01:40:07,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:07,301 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:07,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:07,516 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-06 01:40:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800392120] [2021-05-06 01:40:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:07,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:07,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347505402] [2021-05-06 01:40:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:07,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:40:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:07,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 01:40:07,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800392120] [2021-05-06 01:40:07,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:07,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347505402] [2021-05-06 01:40:07,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347505402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:07,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:07,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:40:07,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068465870] [2021-05-06 01:40:07,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:40:07,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:07,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:40:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:40:07,687 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:40:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:07,735 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2021-05-06 01:40:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:40:07,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-06 01:40:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:07,737 INFO L225 Difference]: With dead ends: 173 [2021-05-06 01:40:07,737 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 01:40:07,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 01:40:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-06 01:40:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 01:40:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2021-05-06 01:40:07,747 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 58 [2021-05-06 01:40:07,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:07,747 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2021-05-06 01:40:07,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:40:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2021-05-06 01:40:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 01:40:07,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:07,748 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:07,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:07,963 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:07,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:07,964 INFO L82 PathProgramCache]: Analyzing trace with hash 78053411, now seen corresponding path program 1 times [2021-05-06 01:40:07,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:07,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933387131] [2021-05-06 01:40:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:07,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:07,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023248651] [2021-05-06 01:40:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 01:40:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 01:40:08,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:08,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933387131] [2021-05-06 01:40:08,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:08,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023248651] [2021-05-06 01:40:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023248651] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:40:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:40:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:40:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548461411] [2021-05-06 01:40:08,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:40:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:40:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:40:08,189 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 01:40:08,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:08,242 INFO L93 Difference]: Finished difference Result 190 states and 240 transitions. [2021-05-06 01:40:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:40:08,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 01:40:08,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:08,243 INFO L225 Difference]: With dead ends: 190 [2021-05-06 01:40:08,243 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 01:40:08,244 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:40:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 01:40:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2021-05-06 01:40:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 01:40:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-05-06 01:40:08,252 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2021-05-06 01:40:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:08,252 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-05-06 01:40:08,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 01:40:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-05-06 01:40:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 01:40:08,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:08,253 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:08,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 01:40:08,472 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:08,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1361251212, now seen corresponding path program 1 times [2021-05-06 01:40:08,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:08,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349555011] [2021-05-06 01:40:08,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:08,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:08,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887052810] [2021-05-06 01:40:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:40:08,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 01:40:08,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349555011] [2021-05-06 01:40:08,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887052810] [2021-05-06 01:40:08,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887052810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:08,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:08,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:40:08,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676644476] [2021-05-06 01:40:08,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:40:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:40:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:08,657 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 01:40:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:08,713 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 01:40:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:40:08,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-06 01:40:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:08,716 INFO L225 Difference]: With dead ends: 141 [2021-05-06 01:40:08,716 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 01:40:08,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 01:40:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-05-06 01:40:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 88 states have internal predecessors, (97), 30 states have call successors, (30), 17 states have call predecessors, (30), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 01:40:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2021-05-06 01:40:08,725 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 74 [2021-05-06 01:40:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:08,726 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2021-05-06 01:40:08,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 01:40:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2021-05-06 01:40:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 01:40:08,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:08,726 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:08,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 01:40:08,947 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:08,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2021-05-06 01:40:08,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:08,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942138343] [2021-05-06 01:40:08,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:08,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:08,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878417913] [2021-05-06 01:40:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:09,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 01:40:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:09,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 01:40:09,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:09,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942138343] [2021-05-06 01:40:09,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:09,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878417913] [2021-05-06 01:40:09,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878417913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:09,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:09,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 01:40:09,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296373003] [2021-05-06 01:40:09,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 01:40:09,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 01:40:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:40:09,578 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:40:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:09,759 INFO L93 Difference]: Finished difference Result 165 states and 200 transitions. [2021-05-06 01:40:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:40:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 01:40:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:09,760 INFO L225 Difference]: With dead ends: 165 [2021-05-06 01:40:09,760 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 01:40:09,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:40:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 01:40:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-05-06 01:40:09,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:40:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-05-06 01:40:09,769 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 79 [2021-05-06 01:40:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:09,770 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-05-06 01:40:09,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:40:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-05-06 01:40:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 01:40:09,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:09,771 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:09,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 01:40:09,985 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:09,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 2 times [2021-05-06 01:40:09,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:09,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481071320] [2021-05-06 01:40:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:09,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:09,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999043386] [2021-05-06 01:40:09,992 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:10,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:40:10,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:10,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:40:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:10,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 01:40:10,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481071320] [2021-05-06 01:40:10,180 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:10,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999043386] [2021-05-06 01:40:10,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999043386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:10,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:10,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:40:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681934023] [2021-05-06 01:40:10,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:40:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:40:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:10,181 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:40:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:10,247 INFO L93 Difference]: Finished difference Result 209 states and 260 transitions. [2021-05-06 01:40:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:40:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-06 01:40:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:10,248 INFO L225 Difference]: With dead ends: 209 [2021-05-06 01:40:10,248 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 01:40:10,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:40:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 01:40:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-06 01:40:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 104 states have internal predecessors, (118), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:40:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2021-05-06 01:40:10,258 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 82 [2021-05-06 01:40:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:10,258 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2021-05-06 01:40:10,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:40:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2021-05-06 01:40:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 01:40:10,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:10,259 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:10,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:10,481 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-06 01:40:10,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:10,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706438409] [2021-05-06 01:40:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:10,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:10,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957939771] [2021-05-06 01:40:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:40:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:40:10,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:10,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 01:40:10,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:10,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706438409] [2021-05-06 01:40:10,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:10,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957939771] [2021-05-06 01:40:10,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957939771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:10,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:10,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:40:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026859818] [2021-05-06 01:40:10,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:10,692 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 01:40:10,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:10,792 INFO L93 Difference]: Finished difference Result 235 states and 287 transitions. [2021-05-06 01:40:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:40:10,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-06 01:40:10,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:10,794 INFO L225 Difference]: With dead ends: 235 [2021-05-06 01:40:10,794 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 01:40:10,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:40:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 01:40:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 01:40:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 120 states have internal predecessors, (134), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:40:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2021-05-06 01:40:10,803 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 90 [2021-05-06 01:40:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:10,803 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2021-05-06 01:40:10,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 01:40:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2021-05-06 01:40:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 01:40:10,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:10,804 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:11,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 01:40:11,021 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash -768653053, now seen corresponding path program 2 times [2021-05-06 01:40:11,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:11,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393940593] [2021-05-06 01:40:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:11,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:11,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171492672] [2021-05-06 01:40:11,027 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:11,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:40:11,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:40:11,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:11,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 01:40:11,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:11,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393940593] [2021-05-06 01:40:11,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:11,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171492672] [2021-05-06 01:40:11,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171492672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:11,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:11,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:40:11,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107799493] [2021-05-06 01:40:11,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:40:11,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:11,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:40:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:40:11,218 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 01:40:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:11,314 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2021-05-06 01:40:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 01:40:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-06 01:40:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:11,316 INFO L225 Difference]: With dead ends: 194 [2021-05-06 01:40:11,316 INFO L226 Difference]: Without dead ends: 187 [2021-05-06 01:40:11,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-06 01:40:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-06 01:40:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 123 states have internal predecessors, (137), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:40:11,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2021-05-06 01:40:11,325 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 98 [2021-05-06 01:40:11,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:11,325 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2021-05-06 01:40:11,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 01:40:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2021-05-06 01:40:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 01:40:11,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:11,327 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:11,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 01:40:11,537 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -721908367, now seen corresponding path program 2 times [2021-05-06 01:40:11,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:11,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071090667] [2021-05-06 01:40:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:11,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:11,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402145163] [2021-05-06 01:40:11,543 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:40:11,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 01:40:11,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:11,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 01:40:11,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:11,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071090667] [2021-05-06 01:40:11,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:11,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402145163] [2021-05-06 01:40:11,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402145163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:11,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:11,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 01:40:11,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925873935] [2021-05-06 01:40:11,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:40:11,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:40:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:40:11,863 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 01:40:12,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:12,013 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2021-05-06 01:40:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:40:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 103 [2021-05-06 01:40:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:12,015 INFO L225 Difference]: With dead ends: 219 [2021-05-06 01:40:12,015 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 01:40:12,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 01:40:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2021-05-06 01:40:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 137 states have internal predecessors, (155), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 01:40:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 257 transitions. [2021-05-06 01:40:12,025 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 257 transitions. Word has length 103 [2021-05-06 01:40:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:12,025 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 257 transitions. [2021-05-06 01:40:12,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 01:40:12,026 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 257 transitions. [2021-05-06 01:40:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 01:40:12,026 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:12,026 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:12,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 01:40:12,241 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 447330249, now seen corresponding path program 3 times [2021-05-06 01:40:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:12,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11047343] [2021-05-06 01:40:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:12,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:12,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325131408] [2021-05-06 01:40:12,247 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:12,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 01:40:12,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 01:40:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:12,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:12,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-06 01:40:12,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:12,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11047343] [2021-05-06 01:40:12,495 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:12,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325131408] [2021-05-06 01:40:12,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325131408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:12,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:12,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 01:40:12,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207699928] [2021-05-06 01:40:12,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 01:40:12,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 01:40:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:12,496 INFO L87 Difference]: Start difference. First operand 212 states and 257 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:40:12,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:12,822 INFO L93 Difference]: Finished difference Result 236 states and 289 transitions. [2021-05-06 01:40:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 01:40:12,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-06 01:40:12,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:12,823 INFO L225 Difference]: With dead ends: 236 [2021-05-06 01:40:12,823 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 01:40:12,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 01:40:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 01:40:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-05-06 01:40:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 129 states have internal predecessors, (138), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:40:12,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2021-05-06 01:40:12,834 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 106 [2021-05-06 01:40:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:12,834 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2021-05-06 01:40:12,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:40:12,834 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2021-05-06 01:40:12,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 01:40:12,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:12,835 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:13,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:13,049 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash 436746049, now seen corresponding path program 2 times [2021-05-06 01:40:13,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:13,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27060053] [2021-05-06 01:40:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:13,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:13,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860874953] [2021-05-06 01:40:13,055 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:13,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:40:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 01:40:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:13,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-06 01:40:13,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:40:13,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27060053] [2021-05-06 01:40:13,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:40:13,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860874953] [2021-05-06 01:40:13,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860874953] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:40:13,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:40:13,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:40:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578326989] [2021-05-06 01:40:13,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:40:13,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:40:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:40:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:40:13,413 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 01:40:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:40:13,521 INFO L93 Difference]: Finished difference Result 286 states and 343 transitions. [2021-05-06 01:40:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:40:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-06 01:40:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:40:13,522 INFO L225 Difference]: With dead ends: 286 [2021-05-06 01:40:13,522 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 01:40:13,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:40:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 01:40:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2021-05-06 01:40:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 40 states have call successors, (40), 23 states have call predecessors, (40), 22 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:40:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 01:40:13,533 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 114 [2021-05-06 01:40:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:40:13,533 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 01:40:13,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 01:40:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 01:40:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 01:40:13,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:40:13,534 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:40:13,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:13,749 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:40:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:40:13,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1338024082, now seen corresponding path program 4 times [2021-05-06 01:40:13,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:40:13,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230768961] [2021-05-06 01:40:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:40:13,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:40:13,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219330580] [2021-05-06 01:40:13,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:40:13,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 01:40:13,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:40:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 01:40:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:40:13,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:13,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:40:14,467 WARN L159 QuantifierPusher]: Ignoring assumption.