/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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:42:59,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:42:59,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:42:59,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:42:59,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:42:59,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:42:59,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:42:59,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:42:59,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:42:59,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:42:59,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:42:59,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:42:59,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:42:59,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:42:59,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:42:59,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:42:59,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:42:59,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:42:59,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:42:59,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:42:59,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 12:42:59,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:42:59,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:42:59,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:42:59,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:42:59,690 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:42:59,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:42:59,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:42:59,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:42:59,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:42:59,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:42:59,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:42:59,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:42:59,945 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:42:59,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:42:59,948 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:42:59,949 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:42:59,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-02 12:43:00,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4302572e/a7a9470b6b4347ddabf3c5e261579c8c/FLAGef95ddfcf [2021-05-02 12:43:00,390 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:43:00,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2021-05-02 12:43:00,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4302572e/a7a9470b6b4347ddabf3c5e261579c8c/FLAGef95ddfcf [2021-05-02 12:43:00,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4302572e/a7a9470b6b4347ddabf3c5e261579c8c [2021-05-02 12:43:00,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:43:00,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:43:00,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:43:00,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:43:00,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:43:00,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:43:00" (1/1) ... [2021-05-02 12:43:00,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35284912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:00, skipping insertion in model container [2021-05-02 12:43:00,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:43:00" (1/1) ... [2021-05-02 12:43:00,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:43:00,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:43:00,926 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2021-05-02 12:43:00,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:43:00,938 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:43:00,977 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2021-05-02 12:43:00,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:43:01,003 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:43:01,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01 WrapperNode [2021-05-02 12:43:01,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:43:01,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:43:01,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:43:01,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:43:01,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (1/1) ... [2021-05-02 12:43:01,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:43:01,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:43:01,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:43:01,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:43:01,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (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 [2021-05-02 12:43:01,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:43:01,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:43:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:43:01,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:43:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:43:01,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:43:01,381 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:43:01,381 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:43:01,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:43:01 BoogieIcfgContainer [2021-05-02 12:43:01,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:43:01,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:43:01,384 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:43:01,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:43:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:43:00" (1/3) ... [2021-05-02 12:43:01,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3b029b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:43:01, skipping insertion in model container [2021-05-02 12:43:01,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:43:01" (2/3) ... [2021-05-02 12:43:01,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d3b029b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:43:01, skipping insertion in model container [2021-05-02 12:43:01,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:43:01" (3/3) ... [2021-05-02 12:43:01,389 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2021-05-02 12:43:01,405 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:43:01,409 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:43:01,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:43:01,461 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:43:01,461 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:43:01,461 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:43:01,461 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:43:01,461 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:43:01,461 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:43:01,462 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:43:01,462 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:43:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:43:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:43:01,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:01,480 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:01,481 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:01,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:01,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 1 times [2021-05-02 12:43:01,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:01,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708726450] [2021-05-02 12:43:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:01,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:01,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141485110] [2021-05-02 12:43:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:43:01,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:01,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:01,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708726450] [2021-05-02 12:43:01,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:01,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141485110] [2021-05-02 12:43:01,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141485110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:43:01,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:43:01,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:43:01,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603928510] [2021-05-02 12:43:01,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:43:01,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:01,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:43:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:43:01,805 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:01,831 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 12:43:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:43:01,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:43:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:01,836 INFO L225 Difference]: With dead ends: 35 [2021-05-02 12:43:01,836 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:43:01,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:43:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:43:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 12:43:01,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:43:01,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 12:43:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:01,861 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:43:01,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:43:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:43:01,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:01,862 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:02,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 12:43:02,073 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1072109235, now seen corresponding path program 1 times [2021-05-02 12:43:02,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:02,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591939368] [2021-05-02 12:43:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:02,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:02,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343132000] [2021-05-02 12:43:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:02,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:43:02,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:02,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:02,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591939368] [2021-05-02 12:43:02,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343132000] [2021-05-02 12:43:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343132000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:02,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:02,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 12:43:02,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493578211] [2021-05-02 12:43:02,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:43:02,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:02,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:43:02,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:43:02,315 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:02,369 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 12:43:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:43:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:43:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:02,370 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:43:02,371 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 12:43:02,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:43:02,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 12:43:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 12:43:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 12:43:02,374 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 12:43:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:02,374 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 12:43:02,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 12:43:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:43:02,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:02,375 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:02,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:02,592 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 606819281, now seen corresponding path program 2 times [2021-05-02 12:43:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954992201] [2021-05-02 12:43:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:02,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:02,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543368255] [2021-05-02 12:43:02,605 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:02,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:43:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:43:02,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:02,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954992201] [2021-05-02 12:43:02,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543368255] [2021-05-02 12:43:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543368255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:02,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:02,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 12:43:02,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500499003] [2021-05-02 12:43:02,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:43:02,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:43:02,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:43:02,824 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:02,945 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 12:43:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:43:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 12:43:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:02,946 INFO L225 Difference]: With dead ends: 24 [2021-05-02 12:43:02,946 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 12:43:02,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:43:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 12:43:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 12:43:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 12:43:02,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 12:43:02,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:02,955 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 12:43:02,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 12:43:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:43:02,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:02,956 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:03,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:03,173 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 139772271, now seen corresponding path program 3 times [2021-05-02 12:43:03,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:03,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98271459] [2021-05-02 12:43:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:03,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:03,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354059806] [2021-05-02 12:43:03,186 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:03,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:43:03,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:03,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:43:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:03,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:03,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98271459] [2021-05-02 12:43:03,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:03,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354059806] [2021-05-02 12:43:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354059806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:03,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 12:43:03,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960387388] [2021-05-02 12:43:03,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:43:03,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:43:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:43:03,453 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:03,534 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 12:43:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:43:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:43:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:03,536 INFO L225 Difference]: With dead ends: 26 [2021-05-02 12:43:03,536 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 12:43:03,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:43:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 12:43:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 12:43:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 12:43:03,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 12:43:03,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:03,540 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 12:43:03,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 12:43:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 12:43:03,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:03,541 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:03,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:03,744 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2015805555, now seen corresponding path program 4 times [2021-05-02 12:43:03,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:03,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137227816] [2021-05-02 12:43:03,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:03,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:03,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435984639] [2021-05-02 12:43:03,760 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:03,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:43:03,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 12:43:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:03,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:03,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:04,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137227816] [2021-05-02 12:43:04,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:04,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435984639] [2021-05-02 12:43:04,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435984639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:04,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:04,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 12:43:04,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960684080] [2021-05-02 12:43:04,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:43:04,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:43:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:43:04,014 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:04,139 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 12:43:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:43:04,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 12:43:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:04,140 INFO L225 Difference]: With dead ends: 28 [2021-05-02 12:43:04,140 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 12:43:04,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:43:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 12:43:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 12:43:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 12:43:04,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 12:43:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:04,144 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 12:43:04,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 12:43:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 12:43:04,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:04,144 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:04,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:04,361 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 943107627, now seen corresponding path program 5 times [2021-05-02 12:43:04,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:04,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708958709] [2021-05-02 12:43:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:04,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:04,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822798167] [2021-05-02 12:43:04,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:04,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 12:43:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:43:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:04,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:04,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:04,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:04,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708958709] [2021-05-02 12:43:04,657 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:04,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822798167] [2021-05-02 12:43:04,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822798167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:04,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:04,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 12:43:04,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662240129] [2021-05-02 12:43:04,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:43:04,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:43:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:43:04,659 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:04,793 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 12:43:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:43:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 12:43:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:04,794 INFO L225 Difference]: With dead ends: 30 [2021-05-02 12:43:04,794 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 12:43:04,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:43:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 12:43:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 12:43:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 12:43:04,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 12:43:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:04,798 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 12:43:04,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 12:43:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 12:43:04,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:04,799 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:04,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:05,000 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1190325577, now seen corresponding path program 6 times [2021-05-02 12:43:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:05,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913250061] [2021-05-02 12:43:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:05,011 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:05,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512112372] [2021-05-02 12:43:05,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-02 12:43:05,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 12:43:05,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 12:43:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:06,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:06,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913250061] [2021-05-02 12:43:06,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:06,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512112372] [2021-05-02 12:43:06,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512112372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:06,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:06,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 12:43:06,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740546904] [2021-05-02 12:43:06,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:43:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:43:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:43:06,116 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:06,266 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 12:43:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:43:06,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 12:43:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:06,267 INFO L225 Difference]: With dead ends: 32 [2021-05-02 12:43:06,267 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 12:43:06,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:43:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 12:43:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 12:43:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 12:43:06,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 12:43:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:06,271 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 12:43:06,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 12:43:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 12:43:06,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:06,271 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:06,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:06,473 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1751393049, now seen corresponding path program 7 times [2021-05-02 12:43:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:06,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707093872] [2021-05-02 12:43:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:06,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:06,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811048097] [2021-05-02 12:43:06,486 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2021-05-02 12:43:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 12:43:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:06,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:06,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:06,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707093872] [2021-05-02 12:43:06,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:06,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811048097] [2021-05-02 12:43:06,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811048097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:06,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:06,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 12:43:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685730587] [2021-05-02 12:43:06,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:43:06,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:43:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:43:06,817 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:07,004 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 12:43:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 12:43:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 12:43:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:07,005 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:43:07,005 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 12:43:07,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:43:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 12:43:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 12:43:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 12:43:07,009 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 12:43:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:07,009 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 12:43:07,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 12:43:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 12:43:07,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:07,010 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:07,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:43:07,213 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1640455429, now seen corresponding path program 8 times [2021-05-02 12:43:07,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:07,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964214180] [2021-05-02 12:43:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:07,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:07,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823753376] [2021-05-02 12:43:07,226 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 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 [2021-05-02 12:43:07,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:43:07,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:43:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:07,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:07,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:07,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:07,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:07,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:07,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964214180] [2021-05-02 12:43:07,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:07,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823753376] [2021-05-02 12:43:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823753376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:07,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:07,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 12:43:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176290818] [2021-05-02 12:43:07,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:43:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:43:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:43:07,633 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:07,823 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 12:43:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:43:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 12:43:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:07,824 INFO L225 Difference]: With dead ends: 36 [2021-05-02 12:43:07,824 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 12:43:07,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:43:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 12:43:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 12:43:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 12:43:07,828 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 12:43:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:07,828 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 12:43:07,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 12:43:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 12:43:07,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:07,829 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:08,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 12:43:08,033 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1326665123, now seen corresponding path program 9 times [2021-05-02 12:43:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777462495] [2021-05-02 12:43:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:08,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:08,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117207188] [2021-05-02 12:43:08,043 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 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 [2021-05-02 12:43:08,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 12:43:08,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 12:43:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:08,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:08,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:08,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:08,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:08,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777462495] [2021-05-02 12:43:08,461 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:08,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117207188] [2021-05-02 12:43:08,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117207188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:08,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:08,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 12:43:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601282456] [2021-05-02 12:43:08,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:43:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:08,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:43:08,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:43:08,463 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:08,703 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 12:43:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:43:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 12:43:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:08,705 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:43:08,705 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 12:43:08,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:43:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 12:43:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 12:43:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 12:43:08,708 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 12:43:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:08,708 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 12:43:08,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 12:43:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:43:08,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:08,709 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:08,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:43:08,925 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash 421891777, now seen corresponding path program 10 times [2021-05-02 12:43:08,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:08,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019116488] [2021-05-02 12:43:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:08,935 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:08,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996502256] [2021-05-02 12:43:08,935 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 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 [2021-05-02 12:43:08,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:43:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:08,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 12:43:08,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:09,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:09,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:09,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019116488] [2021-05-02 12:43:09,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:09,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996502256] [2021-05-02 12:43:09,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996502256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:09,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:09,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 12:43:09,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270331081] [2021-05-02 12:43:09,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 12:43:09,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:09,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 12:43:09,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:43:09,421 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:09,713 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 12:43:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 12:43:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 12:43:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:09,714 INFO L225 Difference]: With dead ends: 40 [2021-05-02 12:43:09,714 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 12:43:09,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:43:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 12:43:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 12:43:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 12:43:09,718 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 12:43:09,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:09,718 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 12:43:09,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 12:43:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:43:09,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:09,719 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:09,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:09,925 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1481899937, now seen corresponding path program 11 times [2021-05-02 12:43:09,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:09,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969408706] [2021-05-02 12:43:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:09,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:09,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868768733] [2021-05-02 12:43:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-05-02 12:43:09,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 12:43:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 12:43:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:10,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:10,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:10,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:10,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969408706] [2021-05-02 12:43:10,431 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:10,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868768733] [2021-05-02 12:43:10,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868768733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:10,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:10,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 12:43:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822216772] [2021-05-02 12:43:10,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 12:43:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 12:43:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:43:10,433 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:10,742 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 12:43:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:43:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 12:43:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:10,743 INFO L225 Difference]: With dead ends: 42 [2021-05-02 12:43:10,743 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 12:43:10,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:43:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 12:43:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 12:43:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 12:43:10,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 12:43:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:10,747 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 12:43:10,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 12:43:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 12:43:10,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:10,748 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:10,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:10,961 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1369668995, now seen corresponding path program 12 times [2021-05-02 12:43:10,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:10,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912308489] [2021-05-02 12:43:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:10,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:10,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815119556] [2021-05-02 12:43:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-02 12:43:11,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 12:43:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 12:43:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:11,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:11,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:11,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:11,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912308489] [2021-05-02 12:43:11,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:11,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815119556] [2021-05-02 12:43:11,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815119556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:11,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:11,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 12:43:11,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857906082] [2021-05-02 12:43:11,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 12:43:11,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 12:43:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:43:11,609 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:12,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:12,023 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 12:43:12,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 12:43:12,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 12:43:12,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:12,024 INFO L225 Difference]: With dead ends: 44 [2021-05-02 12:43:12,025 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 12:43:12,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:43:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 12:43:12,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 12:43:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 12:43:12,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 12:43:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:12,036 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 12:43:12,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 12:43:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 12:43:12,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:12,037 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:12,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 12:43:12,253 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash -889916133, now seen corresponding path program 13 times [2021-05-02 12:43:12,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:12,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612797661] [2021-05-02 12:43:12,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:12,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:12,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098669811] [2021-05-02 12:43:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 12:43:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:12,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 12:43:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:12,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:12,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:12,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:12,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:12,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612797661] [2021-05-02 12:43:12,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:12,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098669811] [2021-05-02 12:43:12,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098669811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:12,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:12,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-02 12:43:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740252999] [2021-05-02 12:43:12,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:43:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:43:12,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:43:12,849 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:13,241 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 12:43:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 12:43:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 12:43:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:13,242 INFO L225 Difference]: With dead ends: 46 [2021-05-02 12:43:13,242 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 12:43:13,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:43:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 12:43:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 12:43:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 12:43:13,258 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 12:43:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:13,258 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 12:43:13,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 12:43:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 12:43:13,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:13,261 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:13,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:13,474 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash 591083577, now seen corresponding path program 14 times [2021-05-02 12:43:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:13,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657088862] [2021-05-02 12:43:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:13,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:13,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078165388] [2021-05-02 12:43:13,486 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 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 [2021-05-02 12:43:13,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:43:13,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 12:43:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:14,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:14,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:14,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:14,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:14,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:14,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657088862] [2021-05-02 12:43:14,129 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:14,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078165388] [2021-05-02 12:43:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078165388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:14,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:14,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 12:43:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83226159] [2021-05-02 12:43:14,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 12:43:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:14,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 12:43:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:43:14,130 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:14,548 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 12:43:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:43:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 12:43:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:14,550 INFO L225 Difference]: With dead ends: 48 [2021-05-02 12:43:14,550 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 12:43:14,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:43:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 12:43:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 12:43:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 12:43:14,553 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 12:43:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:14,554 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 12:43:14,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 12:43:14,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 12:43:14,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:14,555 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:14,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:43:14,769 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2097337385, now seen corresponding path program 15 times [2021-05-02 12:43:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:14,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33152952] [2021-05-02 12:43:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:14,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:14,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066495207] [2021-05-02 12:43:14,785 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 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 [2021-05-02 12:43:14,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 12:43:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-02 12:43:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:15,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:15,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:15,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:15,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:15,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:15,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33152952] [2021-05-02 12:43:15,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:15,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066495207] [2021-05-02 12:43:15,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066495207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:15,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:15,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 12:43:15,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772900621] [2021-05-02 12:43:15,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:43:15,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:43:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:43:15,480 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:15,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:15,962 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 12:43:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 12:43:15,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 12:43:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:15,963 INFO L225 Difference]: With dead ends: 50 [2021-05-02 12:43:15,963 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 12:43:15,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 599.7ms TimeCoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:43:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 12:43:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 12:43:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 12:43:15,967 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 12:43:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:15,967 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 12:43:15,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 12:43:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 12:43:15,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:15,968 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:16,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:16,185 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:16,186 INFO L82 PathProgramCache]: Analyzing trace with hash -99569675, now seen corresponding path program 16 times [2021-05-02 12:43:16,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:16,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871325766] [2021-05-02 12:43:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:16,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659435918] [2021-05-02 12:43:16,211 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 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 [2021-05-02 12:43:16,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:43:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:16,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-02 12:43:16,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:16,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:16,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:16,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:16,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871325766] [2021-05-02 12:43:16,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:16,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659435918] [2021-05-02 12:43:16,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659435918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:16,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:16,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-02 12:43:16,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351062697] [2021-05-02 12:43:16,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 12:43:16,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 12:43:16,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:43:16,990 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:17,480 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 12:43:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 12:43:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 12:43:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:17,481 INFO L225 Difference]: With dead ends: 52 [2021-05-02 12:43:17,481 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 12:43:17,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:43:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 12:43:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 12:43:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 12:43:17,485 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 12:43:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:17,485 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 12:43:17,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 12:43:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 12:43:17,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:17,485 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:17,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 12:43:17,697 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -95181677, now seen corresponding path program 17 times [2021-05-02 12:43:17,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:17,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257295972] [2021-05-02 12:43:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:17,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:17,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834473319] [2021-05-02 12:43:17,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-05-02 12:43:17,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 12:43:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 12:43:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:18,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:18,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:18,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:18,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:18,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:18,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257295972] [2021-05-02 12:43:18,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:18,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834473319] [2021-05-02 12:43:18,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834473319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:18,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:18,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-02 12:43:18,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500464962] [2021-05-02 12:43:18,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 12:43:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:18,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 12:43:18,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:43:18,551 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:19,168 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 12:43:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:43:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 12:43:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:19,169 INFO L225 Difference]: With dead ends: 54 [2021-05-02 12:43:19,169 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 12:43:19,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:43:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 12:43:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 12:43:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 12:43:19,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 12:43:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:19,174 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 12:43:19,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 12:43:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 12:43:19,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:19,175 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:19,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:43:19,394 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:19,394 INFO L82 PathProgramCache]: Analyzing trace with hash -173282895, now seen corresponding path program 18 times [2021-05-02 12:43:19,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:19,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139895577] [2021-05-02 12:43:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:19,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:19,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051987151] [2021-05-02 12:43:19,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-02 12:43:19,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 12:43:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 12:43:19,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:20,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:20,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:20,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:20,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:20,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139895577] [2021-05-02 12:43:20,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:20,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051987151] [2021-05-02 12:43:20,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051987151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:20,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:20,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-02 12:43:20,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282815749] [2021-05-02 12:43:20,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 12:43:20,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:20,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 12:43:20,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:43:20,348 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:20,956 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 12:43:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 12:43:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 12:43:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:20,957 INFO L225 Difference]: With dead ends: 56 [2021-05-02 12:43:20,957 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 12:43:20,958 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:43:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 12:43:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-02 12:43:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 12:43:20,961 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 12:43:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:20,961 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 12:43:20,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 12:43:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 12:43:20,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:20,962 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:21,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:43:21,163 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2080857935, now seen corresponding path program 19 times [2021-05-02 12:43:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:21,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462401801] [2021-05-02 12:43:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:21,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:21,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928512001] [2021-05-02 12:43:21,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-02 12:43:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:21,226 WARN L261 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 12:43:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:22,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:22,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:22,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:22,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:22,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462401801] [2021-05-02 12:43:22,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:22,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928512001] [2021-05-02 12:43:22,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928512001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:22,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:22,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-02 12:43:22,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792799047] [2021-05-02 12:43:22,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:43:22,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:43:22,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:43:22,181 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:22,867 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 12:43:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 12:43:22,867 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 12:43:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:22,868 INFO L225 Difference]: With dead ends: 58 [2021-05-02 12:43:22,868 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 12:43:22,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:43:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 12:43:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 12:43:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 12:43:22,872 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 12:43:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:22,872 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 12:43:22,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 12:43:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 12:43:22,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:22,873 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:23,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:43:23,073 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:23,074 INFO L82 PathProgramCache]: Analyzing trace with hash -648288915, now seen corresponding path program 20 times [2021-05-02 12:43:23,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:23,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86440279] [2021-05-02 12:43:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:23,080 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:23,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132727089] [2021-05-02 12:43:23,081 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:23,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:43:23,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:23,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 12:43:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:24,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:24,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:24,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:24,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:24,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:24,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86440279] [2021-05-02 12:43:24,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132727089] [2021-05-02 12:43:24,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132727089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:24,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:24,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-02 12:43:24,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177599082] [2021-05-02 12:43:24,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:43:24,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:24,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:43:24,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:43:24,252 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:25,039 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 12:43:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:43:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 12:43:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:25,040 INFO L225 Difference]: With dead ends: 60 [2021-05-02 12:43:25,040 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 12:43:25,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1054.8ms TimeCoverageRelationStatistics Valid=98, Invalid=2158, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:43:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 12:43:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 12:43:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 12:43:25,044 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 12:43:25,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:25,044 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 12:43:25,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 12:43:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 12:43:25,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:25,045 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:25,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 12:43:25,265 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:25,266 INFO L82 PathProgramCache]: Analyzing trace with hash 866606091, now seen corresponding path program 21 times [2021-05-02 12:43:25,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:25,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7860300] [2021-05-02 12:43:25,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:25,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:25,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875955770] [2021-05-02 12:43:25,273 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:25,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 12:43:25,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:25,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 12:43:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:26,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:26,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:26,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:26,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7860300] [2021-05-02 12:43:26,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:26,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875955770] [2021-05-02 12:43:26,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875955770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:26,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:26,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-02 12:43:26,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337236959] [2021-05-02 12:43:26,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 12:43:26,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 12:43:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:43:26,499 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:27,334 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 12:43:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:43:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 12:43:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:27,337 INFO L225 Difference]: With dead ends: 62 [2021-05-02 12:43:27,337 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 12:43:27,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1073.9ms TimeCoverageRelationStatistics Valid=102, Invalid=2348, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:43:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 12:43:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-02 12:43:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 12:43:27,342 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 12:43:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:27,342 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 12:43:27,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 12:43:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 12:43:27,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:27,342 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:27,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:27,549 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:27,550 INFO L82 PathProgramCache]: Analyzing trace with hash 686793513, now seen corresponding path program 22 times [2021-05-02 12:43:27,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:27,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541368374] [2021-05-02 12:43:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:27,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:27,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587357863] [2021-05-02 12:43:27,560 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:27,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:43:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:27,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 12:43:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:28,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:28,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541368374] [2021-05-02 12:43:28,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587357863] [2021-05-02 12:43:28,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587357863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:28,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:28,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-02 12:43:28,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427857192] [2021-05-02 12:43:28,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:43:28,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:43:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:43:28,846 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:29,719 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 12:43:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 12:43:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 12:43:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:29,726 INFO L225 Difference]: With dead ends: 64 [2021-05-02 12:43:29,726 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 12:43:29,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1168.8ms TimeCoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:43:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 12:43:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 12:43:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 12:43:29,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 12:43:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:29,730 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 12:43:29,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 12:43:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 12:43:29,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:29,731 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:29,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 12:43:29,932 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash -314402105, now seen corresponding path program 23 times [2021-05-02 12:43:29,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:29,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800134813] [2021-05-02 12:43:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:29,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:29,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279033065] [2021-05-02 12:43:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:29,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 12:43:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:29,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 12:43:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:31,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:31,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:31,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800134813] [2021-05-02 12:43:31,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279033065] [2021-05-02 12:43:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279033065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:31,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:31,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-02 12:43:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989701065] [2021-05-02 12:43:31,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:43:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:43:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:43:31,231 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:32,155 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 12:43:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:43:32,155 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 12:43:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:32,156 INFO L225 Difference]: With dead ends: 66 [2021-05-02 12:43:32,156 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 12:43:32,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1187.7ms TimeCoverageRelationStatistics Valid=110, Invalid=2752, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:43:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 12:43:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 12:43:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 12:43:32,159 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 12:43:32,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:32,159 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 12:43:32,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:32,159 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 12:43:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 12:43:32,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:32,160 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:32,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:32,373 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -390716699, now seen corresponding path program 24 times [2021-05-02 12:43:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:32,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594583365] [2021-05-02 12:43:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:32,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:32,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004242464] [2021-05-02 12:43:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:32,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 12:43:32,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:32,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 107 conjunts are in the unsatisfiable core [2021-05-02 12:43:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:33,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:33,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594583365] [2021-05-02 12:43:33,811 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:33,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004242464] [2021-05-02 12:43:33,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004242464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:33,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:33,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-02 12:43:33,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530544518] [2021-05-02 12:43:33,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 12:43:33,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:33,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 12:43:33,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:43:33,813 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:34,813 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 12:43:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:43:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 12:43:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:34,814 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:43:34,814 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 12:43:34,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1319.4ms TimeCoverageRelationStatistics Valid=114, Invalid=2966, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:43:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 12:43:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 12:43:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 12:43:34,818 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 12:43:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:34,818 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 12:43:34,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 12:43:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 12:43:34,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:34,819 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:35,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 12:43:35,025 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:35,026 INFO L82 PathProgramCache]: Analyzing trace with hash -714597501, now seen corresponding path program 25 times [2021-05-02 12:43:35,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:35,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257543448] [2021-05-02 12:43:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:35,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:35,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250159369] [2021-05-02 12:43:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:35,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-02 12:43:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:36,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:36,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:36,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:36,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:36,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257543448] [2021-05-02 12:43:36,535 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:36,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250159369] [2021-05-02 12:43:36,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250159369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:36,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-02 12:43:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131847930] [2021-05-02 12:43:36,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 12:43:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:36,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 12:43:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 12:43:36,537 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:37,629 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 12:43:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 12:43:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 12:43:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:37,630 INFO L225 Difference]: With dead ends: 70 [2021-05-02 12:43:37,630 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 12:43:37,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1390.1ms TimeCoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:43:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 12:43:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 12:43:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 12:43:37,634 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 12:43:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:37,634 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 12:43:37,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 12:43:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 12:43:37,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:37,635 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:37,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 12:43:37,835 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:37,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1568564385, now seen corresponding path program 26 times [2021-05-02 12:43:37,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:37,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238748781] [2021-05-02 12:43:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:37,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:37,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254624131] [2021-05-02 12:43:37,847 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:37,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:43:37,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:37,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 115 conjunts are in the unsatisfiable core [2021-05-02 12:43:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:39,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:39,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:39,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:39,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238748781] [2021-05-02 12:43:39,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254624131] [2021-05-02 12:43:39,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254624131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:39,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:39,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-02 12:43:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425564145] [2021-05-02 12:43:39,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 12:43:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 12:43:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 12:43:39,511 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:40,778 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 12:43:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 12:43:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 12:43:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:40,779 INFO L225 Difference]: With dead ends: 72 [2021-05-02 12:43:40,779 INFO L226 Difference]: Without dead ends: 67 [2021-05-02 12:43:40,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1565.7ms TimeCoverageRelationStatistics Valid=122, Invalid=3418, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 12:43:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-02 12:43:40,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-02 12:43:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 12:43:40,783 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 12:43:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:40,784 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 12:43:40,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:40,784 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 12:43:40,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 12:43:40,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:40,784 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:40,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 12:43:40,993 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash 958848575, now seen corresponding path program 27 times [2021-05-02 12:43:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:40,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991797398] [2021-05-02 12:43:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:41,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174564301] [2021-05-02 12:43:41,001 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:41,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 12:43:41,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:41,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-02 12:43:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:42,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:43,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:43,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:43,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:43,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:43,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991797398] [2021-05-02 12:43:43,179 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:43,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174564301] [2021-05-02 12:43:43,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174564301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:43,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:43,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-02 12:43:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968987513] [2021-05-02 12:43:43,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 12:43:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:43,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 12:43:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 12:43:43,180 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:44,643 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 12:43:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 12:43:44,643 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 12:43:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:44,644 INFO L225 Difference]: With dead ends: 74 [2021-05-02 12:43:44,644 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 12:43:44,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2000.4ms TimeCoverageRelationStatistics Valid=126, Invalid=3656, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 12:43:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 12:43:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 12:43:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 12:43:44,648 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 12:43:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:44,648 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 12:43:44,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 12:43:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 12:43:44,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:44,649 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:44,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:44,866 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -862492579, now seen corresponding path program 28 times [2021-05-02 12:43:44,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:44,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366871477] [2021-05-02 12:43:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:44,874 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:44,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895053683] [2021-05-02 12:43:44,875 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:44,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:43:44,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:44,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 123 conjunts are in the unsatisfiable core [2021-05-02 12:43:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:46,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:46,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:46,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366871477] [2021-05-02 12:43:46,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:46,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895053683] [2021-05-02 12:43:46,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895053683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:46,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:46,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-02 12:43:46,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894070614] [2021-05-02 12:43:46,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 12:43:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 12:43:46,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 12:43:46,885 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:48,344 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 12:43:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 12:43:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 12:43:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:48,345 INFO L225 Difference]: With dead ends: 76 [2021-05-02 12:43:48,345 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 12:43:48,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1881.0ms TimeCoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 12:43:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 12:43:48,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 12:43:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 12:43:48,349 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 12:43:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:48,349 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 12:43:48,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:48,350 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 12:43:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 12:43:48,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:48,350 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:48,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 12:43:48,569 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:48,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:48,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1175315195, now seen corresponding path program 29 times [2021-05-02 12:43:48,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:48,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915783626] [2021-05-02 12:43:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:48,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:48,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885521610] [2021-05-02 12:43:48,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:48,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 12:43:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:48,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 127 conjunts are in the unsatisfiable core [2021-05-02 12:43:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:50,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:50,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:50,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:50,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:50,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915783626] [2021-05-02 12:43:50,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:50,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885521610] [2021-05-02 12:43:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885521610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:50,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:50,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-02 12:43:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226891912] [2021-05-02 12:43:50,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 12:43:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 12:43:50,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 12:43:50,740 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:52,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:52,205 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 12:43:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 12:43:52,205 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 12:43:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:52,206 INFO L225 Difference]: With dead ends: 78 [2021-05-02 12:43:52,206 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 12:43:52,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2007.2ms TimeCoverageRelationStatistics Valid=134, Invalid=4156, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 12:43:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 12:43:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 12:43:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 12:43:52,210 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 12:43:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:52,210 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 12:43:52,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 12:43:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 12:43:52,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:52,211 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:52,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:52,428 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:52,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1003499033, now seen corresponding path program 30 times [2021-05-02 12:43:52,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:52,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366793812] [2021-05-02 12:43:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:52,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:52,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821910471] [2021-05-02 12:43:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:52,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 12:43:52,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:43:52,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 131 conjunts are in the unsatisfiable core [2021-05-02 12:43:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:54,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:54,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:54,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:54,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:54,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:54,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366793812] [2021-05-02 12:43:54,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:54,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821910471] [2021-05-02 12:43:54,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821910471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:54,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:54,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-02 12:43:54,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33730293] [2021-05-02 12:43:54,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 12:43:54,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 12:43:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 12:43:54,568 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:43:56,202 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 12:43:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 12:43:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 12:43:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:43:56,203 INFO L225 Difference]: With dead ends: 80 [2021-05-02 12:43:56,203 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 12:43:56,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1994.6ms TimeCoverageRelationStatistics Valid=138, Invalid=4418, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 12:43:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 12:43:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 12:43:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 12:43:56,208 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 12:43:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:43:56,208 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 12:43:56,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:43:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 12:43:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 12:43:56,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:43:56,209 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:43:56,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-02 12:43:56,417 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:43:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:43:56,417 INFO L82 PathProgramCache]: Analyzing trace with hash -903075401, now seen corresponding path program 31 times [2021-05-02 12:43:56,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:43:56,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140396234] [2021-05-02 12:43:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:43:56,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:43:56,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158340837] [2021-05-02 12:43:56,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:43:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:43:56,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 135 conjunts are in the unsatisfiable core [2021-05-02 12:43:56,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:43:58,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:43:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:43:59,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:43:59,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140396234] [2021-05-02 12:43:59,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:43:59,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158340837] [2021-05-02 12:43:59,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158340837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:43:59,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:43:59,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-02 12:43:59,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899840628] [2021-05-02 12:43:59,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 12:43:59,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:43:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 12:43:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 12:43:59,130 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:00,983 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 12:44:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 12:44:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 12:44:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:00,985 INFO L225 Difference]: With dead ends: 82 [2021-05-02 12:44:00,985 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 12:44:00,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2569.3ms TimeCoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 12:44:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 12:44:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 12:44:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 12:44:00,989 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 12:44:00,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:00,989 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 12:44:00,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 12:44:00,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 12:44:00,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:00,990 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:01,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-02 12:44:01,213 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash 829928917, now seen corresponding path program 32 times [2021-05-02 12:44:01,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:01,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161126901] [2021-05-02 12:44:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:01,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:01,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574301212] [2021-05-02 12:44:01,224 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:01,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:44:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:01,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 139 conjunts are in the unsatisfiable core [2021-05-02 12:44:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:04,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:04,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:04,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:04,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:04,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:04,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161126901] [2021-05-02 12:44:04,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:04,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574301212] [2021-05-02 12:44:04,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574301212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:04,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:04,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-02 12:44:04,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307146797] [2021-05-02 12:44:04,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 12:44:04,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:04,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 12:44:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 12:44:04,290 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:06,321 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 12:44:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 12:44:06,321 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 12:44:06,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:06,322 INFO L225 Difference]: With dead ends: 84 [2021-05-02 12:44:06,322 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 12:44:06,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2917.1ms TimeCoverageRelationStatistics Valid=146, Invalid=4966, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 12:44:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 12:44:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 12:44:06,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 12:44:06,327 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 12:44:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:06,327 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 12:44:06,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 12:44:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 12:44:06,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:06,328 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:06,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:06,546 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:06,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:06,547 INFO L82 PathProgramCache]: Analyzing trace with hash -200232333, now seen corresponding path program 33 times [2021-05-02 12:44:06,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661130007] [2021-05-02 12:44:06,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:06,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:06,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394508216] [2021-05-02 12:44:06,554 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:06,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 12:44:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:06,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 143 conjunts are in the unsatisfiable core [2021-05-02 12:44:06,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:10,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:10,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:10,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:10,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661130007] [2021-05-02 12:44:10,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:10,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394508216] [2021-05-02 12:44:10,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394508216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:10,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:10,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-02 12:44:10,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609884506] [2021-05-02 12:44:10,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 12:44:10,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:10,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 12:44:10,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 12:44:10,279 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:12,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:12,689 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 12:44:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 12:44:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 12:44:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:12,690 INFO L225 Difference]: With dead ends: 86 [2021-05-02 12:44:12,690 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 12:44:12,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3553.1ms TimeCoverageRelationStatistics Valid=150, Invalid=5252, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 12:44:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 12:44:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 12:44:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 12:44:12,701 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 12:44:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:12,701 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 12:44:12,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 12:44:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 12:44:12,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:12,702 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:12,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-02 12:44:12,919 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1952251793, now seen corresponding path program 34 times [2021-05-02 12:44:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368858228] [2021-05-02 12:44:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:12,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:12,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480277223] [2021-05-02 12:44:12,927 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:12,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:44:12,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:12,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 147 conjunts are in the unsatisfiable core [2021-05-02 12:44:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:15,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:15,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:15,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:16,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:16,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368858228] [2021-05-02 12:44:16,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:16,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480277223] [2021-05-02 12:44:16,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480277223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:16,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:16,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-02 12:44:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065534388] [2021-05-02 12:44:16,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 12:44:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:16,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 12:44:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 12:44:16,073 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:18,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:18,397 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 12:44:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 12:44:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 12:44:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:18,399 INFO L225 Difference]: With dead ends: 88 [2021-05-02 12:44:18,399 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 12:44:18,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3025.5ms TimeCoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 12:44:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 12:44:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 12:44:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:18,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 12:44:18,404 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 12:44:18,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:18,404 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 12:44:18,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:18,404 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 12:44:18,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 12:44:18,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:18,405 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:18,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:18,617 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 315260207, now seen corresponding path program 35 times [2021-05-02 12:44:18,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:18,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083666977] [2021-05-02 12:44:18,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:18,627 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:18,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372881693] [2021-05-02 12:44:18,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:18,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 12:44:18,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:18,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 151 conjunts are in the unsatisfiable core [2021-05-02 12:44:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:22,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:22,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:22,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:22,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:22,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083666977] [2021-05-02 12:44:22,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:22,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372881693] [2021-05-02 12:44:22,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372881693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:22,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:22,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-02 12:44:22,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865271773] [2021-05-02 12:44:22,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 12:44:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 12:44:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 12:44:22,615 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:25,204 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 12:44:25,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 12:44:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 12:44:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:25,205 INFO L225 Difference]: With dead ends: 90 [2021-05-02 12:44:25,205 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 12:44:25,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3822.7ms TimeCoverageRelationStatistics Valid=158, Invalid=5848, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 12:44:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 12:44:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 12:44:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 12:44:25,212 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 12:44:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:25,212 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 12:44:25,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 12:44:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 12:44:25,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:25,213 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:25,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 12:44:25,419 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash -875623603, now seen corresponding path program 36 times [2021-05-02 12:44:25,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:25,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874044588] [2021-05-02 12:44:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:25,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:25,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836648021] [2021-05-02 12:44:25,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:25,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 12:44:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:25,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 158 conjunts are in the unsatisfiable core [2021-05-02 12:44:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:25,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:29,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:29,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874044588] [2021-05-02 12:44:29,849 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:29,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836648021] [2021-05-02 12:44:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836648021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:29,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:29,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2021-05-02 12:44:29,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939419324] [2021-05-02 12:44:29,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 12:44:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 12:44:29,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=6006, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 12:44:29,851 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:38,149 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 12:44:38,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 12:44:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 12:44:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:38,151 INFO L225 Difference]: With dead ends: 92 [2021-05-02 12:44:38,151 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 12:44:38,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 9585.2ms TimeCoverageRelationStatistics Valid=466, Invalid=23404, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 12:44:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 12:44:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 12:44:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 12:44:38,157 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 12:44:38,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:38,157 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 12:44:38,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:38,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 12:44:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 12:44:38,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:38,158 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:38,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-02 12:44:38,359 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1441303019, now seen corresponding path program 37 times [2021-05-02 12:44:38,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:38,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601379997] [2021-05-02 12:44:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:38,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:38,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973104563] [2021-05-02 12:44:38,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:44:38,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 159 conjunts are in the unsatisfiable core [2021-05-02 12:44:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:42,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:42,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:42,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601379997] [2021-05-02 12:44:42,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:42,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973104563] [2021-05-02 12:44:42,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973104563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:42,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:42,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-02 12:44:42,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757310148] [2021-05-02 12:44:42,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 12:44:42,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 12:44:42,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 12:44:42,723 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:45,806 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 12:44:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 12:44:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 12:44:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:45,807 INFO L225 Difference]: With dead ends: 94 [2021-05-02 12:44:45,807 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 12:44:45,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4305.6ms TimeCoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 12:44:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 12:44:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 12:44:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 12:44:45,813 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 12:44:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:45,814 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 12:44:45,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 12:44:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 12:44:45,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:45,814 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:46,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:46,029 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1080239863, now seen corresponding path program 38 times [2021-05-02 12:44:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:46,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114302716] [2021-05-02 12:44:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:46,037 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:46,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814458071] [2021-05-02 12:44:46,038 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:46,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:44:46,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:46,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 163 conjunts are in the unsatisfiable core [2021-05-02 12:44:46,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:49,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:49,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:49,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:49,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:49,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114302716] [2021-05-02 12:44:49,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814458071] [2021-05-02 12:44:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814458071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:49,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:49,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-02 12:44:49,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653336895] [2021-05-02 12:44:49,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 12:44:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:49,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 12:44:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6480, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 12:44:49,928 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:44:52,990 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 12:44:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 12:44:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 12:44:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:44:52,991 INFO L225 Difference]: With dead ends: 96 [2021-05-02 12:44:52,991 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 12:44:52,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3728.5ms TimeCoverageRelationStatistics Valid=170, Invalid=6802, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 12:44:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 12:44:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-02 12:44:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 12:44:52,997 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 12:44:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:44:52,997 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 12:44:52,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:44:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 12:44:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 12:44:52,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:44:52,998 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:44:53,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:53,213 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:44:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:44:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1921394521, now seen corresponding path program 39 times [2021-05-02 12:44:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:44:53,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080803369] [2021-05-02 12:44:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:44:53,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:44:53,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790409307] [2021-05-02 12:44:53,222 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:44:53,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 12:44:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:44:53,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 167 conjunts are in the unsatisfiable core [2021-05-02 12:44:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:44:57,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:57,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:57,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:44:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:44:57,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:44:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080803369] [2021-05-02 12:44:57,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:44:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790409307] [2021-05-02 12:44:57,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790409307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:44:57,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:44:57,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-02 12:44:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237380481] [2021-05-02 12:44:57,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 12:44:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:44:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 12:44:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6806, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 12:44:57,626 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:45:01,075 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 12:45:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 12:45:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 12:45:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:45:01,077 INFO L225 Difference]: With dead ends: 98 [2021-05-02 12:45:01,077 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 12:45:01,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4202.0ms TimeCoverageRelationStatistics Valid=174, Invalid=7136, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 12:45:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 12:45:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 12:45:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 12:45:01,082 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 12:45:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:45:01,083 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 12:45:01,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 12:45:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 12:45:01,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:45:01,084 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:45:01,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:01,295 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:45:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:45:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1477798085, now seen corresponding path program 40 times [2021-05-02 12:45:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:45:01,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363768657] [2021-05-02 12:45:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:45:01,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:45:01,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739258932] [2021-05-02 12:45:01,303 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:01,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:45:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:45:01,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 171 conjunts are in the unsatisfiable core [2021-05-02 12:45:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:45:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:06,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:06,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:45:07,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:45:07,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363768657] [2021-05-02 12:45:07,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:45:07,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739258932] [2021-05-02 12:45:07,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739258932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:45:07,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:45:07,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-02 12:45:07,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169739138] [2021-05-02 12:45:07,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 12:45:07,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:45:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 12:45:07,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=7140, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 12:45:07,342 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:45:11,243 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 12:45:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 12:45:11,244 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 12:45:11,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:45:11,245 INFO L225 Difference]: With dead ends: 100 [2021-05-02 12:45:11,245 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 12:45:11,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5997.4ms TimeCoverageRelationStatistics Valid=178, Invalid=7478, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 12:45:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 12:45:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 12:45:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 12:45:11,259 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 12:45:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:45:11,260 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 12:45:11,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 12:45:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 12:45:11,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:45:11,260 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:45:11,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 12:45:11,477 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:45:11,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:45:11,477 INFO L82 PathProgramCache]: Analyzing trace with hash -368219805, now seen corresponding path program 41 times [2021-05-02 12:45:11,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:45:11,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647494550] [2021-05-02 12:45:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:45:11,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:45:11,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487273940] [2021-05-02 12:45:11,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:11,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 12:45:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:45:11,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 175 conjunts are in the unsatisfiable core [2021-05-02 12:45:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:45:18,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:18,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:18,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:45:18,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:45:18,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647494550] [2021-05-02 12:45:18,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:45:18,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487273940] [2021-05-02 12:45:18,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487273940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:45:18,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:45:18,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-02 12:45:18,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568799806] [2021-05-02 12:45:18,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 12:45:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:45:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 12:45:18,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=7482, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 12:45:18,732 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:45:23,322 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 12:45:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 12:45:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 12:45:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:45:23,324 INFO L225 Difference]: With dead ends: 102 [2021-05-02 12:45:23,324 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 12:45:23,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7175.5ms TimeCoverageRelationStatistics Valid=182, Invalid=7828, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 12:45:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 12:45:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-02 12:45:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 12:45:23,330 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 12:45:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:45:23,331 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 12:45:23,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:23,331 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 12:45:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 12:45:23,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:45:23,331 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:45:23,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:23,545 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:45:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:45:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -569918847, now seen corresponding path program 42 times [2021-05-02 12:45:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:45:23,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597419576] [2021-05-02 12:45:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:45:23,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:45:23,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746709988] [2021-05-02 12:45:23,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:23,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 12:45:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:45:23,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 179 conjunts are in the unsatisfiable core [2021-05-02 12:45:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:45:33,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:33,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:33,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:45:33,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:45:33,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597419576] [2021-05-02 12:45:33,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:45:33,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746709988] [2021-05-02 12:45:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746709988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:45:33,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:45:33,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-02 12:45:33,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972754526] [2021-05-02 12:45:33,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 12:45:33,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:45:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 12:45:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7832, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 12:45:33,947 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:45:38,288 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 12:45:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 12:45:38,288 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 12:45:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:45:38,289 INFO L225 Difference]: With dead ends: 104 [2021-05-02 12:45:38,289 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 12:45:38,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 10241.4ms TimeCoverageRelationStatistics Valid=186, Invalid=8186, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 12:45:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 12:45:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 12:45:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 12:45:38,295 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 12:45:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:45:38,295 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 12:45:38,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 12:45:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 12:45:38,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:45:38,296 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:45:38,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:38,501 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:45:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:45:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1129169889, now seen corresponding path program 43 times [2021-05-02 12:45:38,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:45:38,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570420697] [2021-05-02 12:45:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:45:38,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:45:38,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847926653] [2021-05-02 12:45:38,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:45:38,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 183 conjunts are in the unsatisfiable core [2021-05-02 12:45:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:45:43,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:43,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:43,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:45:43,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:45:43,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570420697] [2021-05-02 12:45:43,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:45:43,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847926653] [2021-05-02 12:45:43,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847926653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:45:43,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:45:43,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-02 12:45:43,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807075069] [2021-05-02 12:45:43,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 12:45:43,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:45:43,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 12:45:43,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=8190, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 12:45:43,933 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:45:49,655 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 12:45:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 12:45:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 12:45:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:45:49,657 INFO L225 Difference]: With dead ends: 106 [2021-05-02 12:45:49,657 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 12:45:49,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5441.8ms TimeCoverageRelationStatistics Valid=190, Invalid=8552, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 12:45:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 12:45:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 12:45:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 12:45:49,669 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 12:45:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:45:49,669 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 12:45:49,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 91 states have (on average 1.032967032967033) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:45:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 12:45:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 12:45:49,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:45:49,670 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:45:49,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-02 12:45:49,871 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:45:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:45:49,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1698509251, now seen corresponding path program 44 times [2021-05-02 12:45:49,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:45:49,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962640998] [2021-05-02 12:45:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:45:49,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:45:49,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865508964] [2021-05-02 12:45:49,880 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:45:49,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:45:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:45:49,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-02 12:45:49,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:45:57,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:57,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:45:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:45:57,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:45:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962640998] [2021-05-02 12:45:57,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:45:57,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865508964] [2021-05-02 12:45:57,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865508964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:45:57,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:45:57,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-02 12:45:57,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971264778] [2021-05-02 12:45:57,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 12:45:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:45:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 12:45:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8556, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 12:45:57,910 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:02,554 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 12:46:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 12:46:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 12:46:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:02,555 INFO L225 Difference]: With dead ends: 108 [2021-05-02 12:46:02,555 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 12:46:02,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7864.7ms TimeCoverageRelationStatistics Valid=194, Invalid=8926, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 12:46:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 12:46:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 12:46:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 12:46:02,563 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 12:46:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:02,564 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 12:46:02,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 12:46:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 12:46:02,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:02,564 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:02,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:02,782 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 922177755, now seen corresponding path program 45 times [2021-05-02 12:46:02,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:02,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283614530] [2021-05-02 12:46:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:02,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:46:02,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54983559] [2021-05-02 12:46:02,794 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:02,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 12:46:03,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:03,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 191 conjunts are in the unsatisfiable core [2021-05-02 12:46:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:09,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:09,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:09,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283614530] [2021-05-02 12:46:09,679 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:46:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54983559] [2021-05-02 12:46:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54983559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:09,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:46:09,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-05-02 12:46:09,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989198893] [2021-05-02 12:46:09,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 12:46:09,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 12:46:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=8930, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 12:46:09,680 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:15,771 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 12:46:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 12:46:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 12:46:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:15,773 INFO L225 Difference]: With dead ends: 110 [2021-05-02 12:46:15,773 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 12:46:15,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6694.9ms TimeCoverageRelationStatistics Valid=198, Invalid=9308, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 12:46:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 12:46:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-02 12:46:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 12:46:15,778 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 12:46:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:15,779 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 12:46:15,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:15,779 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 12:46:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 12:46:15,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:15,779 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:15,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 12:46:15,998 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1743412231, now seen corresponding path program 46 times [2021-05-02 12:46:15,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:15,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293493918] [2021-05-02 12:46:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:16,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:46:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450594591] [2021-05-02 12:46:16,007 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:16,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:46:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:16,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 195 conjunts are in the unsatisfiable core [2021-05-02 12:46:16,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:23,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:23,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:24,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:24,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293493918] [2021-05-02 12:46:24,101 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:46:24,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450594591] [2021-05-02 12:46:24,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450594591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:24,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:46:24,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2021-05-02 12:46:24,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510336278] [2021-05-02 12:46:24,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 12:46:24,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:24,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 12:46:24,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=9312, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 12:46:24,102 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:28,320 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 12:46:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 12:46:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 12:46:28,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:28,321 INFO L225 Difference]: With dead ends: 112 [2021-05-02 12:46:28,321 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 12:46:28,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7927.4ms TimeCoverageRelationStatistics Valid=202, Invalid=9698, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 12:46:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 12:46:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 12:46:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 12:46:28,327 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 12:46:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:28,327 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 12:46:28,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 12:46:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 12:46:28,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:28,328 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:28,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:28,541 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 720086935, now seen corresponding path program 47 times [2021-05-02 12:46:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:28,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023286611] [2021-05-02 12:46:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:28,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:46:28,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496403133] [2021-05-02 12:46:28,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:28,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 12:46:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:28,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 199 conjunts are in the unsatisfiable core [2021-05-02 12:46:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:34,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:35,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:35,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:35,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023286611] [2021-05-02 12:46:35,720 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:46:35,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496403133] [2021-05-02 12:46:35,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496403133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:35,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:46:35,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2021-05-02 12:46:35,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647826886] [2021-05-02 12:46:35,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 12:46:35,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 12:46:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=9702, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 12:46:35,722 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:43,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:43,150 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 12:46:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 12:46:43,151 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 12:46:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:43,152 INFO L225 Difference]: With dead ends: 114 [2021-05-02 12:46:43,152 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 12:46:43,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7179.3ms TimeCoverageRelationStatistics Valid=206, Invalid=10096, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 12:46:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 12:46:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 12:46:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 12:46:43,158 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 12:46:43,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:43,158 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 12:46:43,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 12:46:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 12:46:43,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:43,159 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:43,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:43,371 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:43,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1615805365, now seen corresponding path program 48 times [2021-05-02 12:46:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:43,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460918128] [2021-05-02 12:46:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:43,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:46:43,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873803067] [2021-05-02 12:46:43,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:43,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 12:46:43,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:46:43,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 203 conjunts are in the unsatisfiable core [2021-05-02 12:46:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:46:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:52,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:52,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:46:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:46:52,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:46:52,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460918128] [2021-05-02 12:46:52,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:46:52,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873803067] [2021-05-02 12:46:52,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873803067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:46:52,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:46:52,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2021-05-02 12:46:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667123976] [2021-05-02 12:46:52,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 12:46:52,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:46:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 12:46:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=10100, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 12:46:52,424 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:46:58,116 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 12:46:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 12:46:58,116 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 12:46:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:46:58,117 INFO L225 Difference]: With dead ends: 116 [2021-05-02 12:46:58,117 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 12:46:58,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8869.9ms TimeCoverageRelationStatistics Valid=210, Invalid=10502, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 12:46:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 12:46:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 12:46:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 12:46:58,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 12:46:58,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:46:58,123 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 12:46:58,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:46:58,123 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 12:46:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 12:46:58,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:46:58,124 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:46:58,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:58,325 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:46:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:46:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -887209901, now seen corresponding path program 49 times [2021-05-02 12:46:58,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:46:58,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927215642] [2021-05-02 12:46:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:46:58,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:46:58,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679176151] [2021-05-02 12:46:58,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:46:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:46:58,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 207 conjunts are in the unsatisfiable core [2021-05-02 12:46:58,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:47:06,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:06,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:47:06,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:47:06,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927215642] [2021-05-02 12:47:06,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:47:06,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679176151] [2021-05-02 12:47:06,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679176151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:47:06,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:47:06,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2021-05-02 12:47:06,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156211904] [2021-05-02 12:47:06,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 12:47:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:47:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 12:47:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=10506, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 12:47:06,732 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:16,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:47:16,000 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 12:47:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 12:47:16,001 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 12:47:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:47:16,001 INFO L225 Difference]: With dead ends: 118 [2021-05-02 12:47:16,001 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 12:47:16,002 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8245.0ms TimeCoverageRelationStatistics Valid=214, Invalid=10916, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 12:47:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 12:47:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 12:47:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 12:47:16,007 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 12:47:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:47:16,007 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 12:47:16,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 12:47:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 12:47:16,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:47:16,008 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:47:16,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:47:16,225 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:47:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:47:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1103194767, now seen corresponding path program 50 times [2021-05-02 12:47:16,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:47:16,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644368200] [2021-05-02 12:47:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:47:16,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:47:16,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355713372] [2021-05-02 12:47:16,233 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:47:16,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:47:16,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:47:16,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 211 conjunts are in the unsatisfiable core [2021-05-02 12:47:16,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:47:23,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:23,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:23,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:47:23,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:47:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644368200] [2021-05-02 12:47:23,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:47:23,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355713372] [2021-05-02 12:47:23,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355713372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:47:23,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:47:23,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2021-05-02 12:47:23,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788622772] [2021-05-02 12:47:23,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 12:47:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:47:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 12:47:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10920, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 12:47:23,754 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:31,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:47:31,662 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 12:47:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 12:47:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 12:47:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:47:31,664 INFO L225 Difference]: With dead ends: 120 [2021-05-02 12:47:31,664 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 12:47:31,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7350.6ms TimeCoverageRelationStatistics Valid=218, Invalid=11338, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 12:47:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 12:47:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 12:47:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 12:47:31,669 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 12:47:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:47:31,670 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 12:47:31,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 12:47:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 12:47:31,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:47:31,670 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:47:31,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 12:47:31,885 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:47:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:47:31,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1788746511, now seen corresponding path program 51 times [2021-05-02 12:47:31,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:47:31,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730997943] [2021-05-02 12:47:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:47:31,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:47:31,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829668053] [2021-05-02 12:47:31,894 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:47:31,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-05-02 12:47:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:47:32,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-02 12:47:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:47:41,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:41,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:41,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:47:41,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:47:41,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730997943] [2021-05-02 12:47:41,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:47:41,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829668053] [2021-05-02 12:47:41,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829668053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:47:41,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:47:41,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108] total 108 [2021-05-02 12:47:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781643377] [2021-05-02 12:47:41,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 12:47:41,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:47:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 12:47:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=11342, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 12:47:41,758 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:47:47,557 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 12:47:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 12:47:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 12:47:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:47:47,558 INFO L225 Difference]: With dead ends: 122 [2021-05-02 12:47:47,559 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 12:47:47,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9615.2ms TimeCoverageRelationStatistics Valid=222, Invalid=11768, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 12:47:47,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 12:47:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 12:47:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 12:47:47,565 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 12:47:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:47:47,565 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 12:47:47,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:47:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 12:47:47,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 12:47:47,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:47:47,565 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:47:47,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-02 12:47:47,766 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:47:47,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:47:47,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2100474157, now seen corresponding path program 52 times [2021-05-02 12:47:47,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:47:47,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784300410] [2021-05-02 12:47:47,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:47:47,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:47:47,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472975345] [2021-05-02 12:47:47,774 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:47:47,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:47:47,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:47:47,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 219 conjunts are in the unsatisfiable core [2021-05-02 12:47:47,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:47:55,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:55,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:55,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:55,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:47:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:47:56,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:47:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784300410] [2021-05-02 12:47:56,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:47:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472975345] [2021-05-02 12:47:56,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472975345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:47:56,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:47:56,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110] total 110 [2021-05-02 12:47:56,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16999375] [2021-05-02 12:47:56,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 12:47:56,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:47:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 12:47:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11772, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 12:47:56,262 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:48:02,523 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 12:48:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 12:48:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-02 12:48:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:48:02,524 INFO L225 Difference]: With dead ends: 124 [2021-05-02 12:48:02,524 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 12:48:02,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 8344.5ms TimeCoverageRelationStatistics Valid=226, Invalid=12206, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 12:48:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 12:48:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 12:48:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 12:48:02,530 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 12:48:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:48:02,530 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 12:48:02,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 109 states have (on average 1.0275229357798166) internal successors, (112), 109 states have internal predecessors, (112), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 12:48:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 12:48:02,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:48:02,531 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:48:02,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-02 12:48:02,733 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:48:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:48:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1023031243, now seen corresponding path program 53 times [2021-05-02 12:48:02,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:48:02,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280890619] [2021-05-02 12:48:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:48:02,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:48:02,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796407832] [2021-05-02 12:48:02,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:48:02,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-05-02 12:48:02,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:48:02,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 223 conjunts are in the unsatisfiable core [2021-05-02 12:48:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:48:10,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:48:11,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:48:11,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280890619] [2021-05-02 12:48:11,517 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:48:11,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796407832] [2021-05-02 12:48:11,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796407832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:48:11,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:48:11,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112] total 112 [2021-05-02 12:48:11,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961222238] [2021-05-02 12:48:11,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 12:48:11,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:48:11,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 12:48:11,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=12210, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 12:48:11,520 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:48:21,245 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 12:48:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 12:48:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 12:48:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:48:21,248 INFO L225 Difference]: With dead ends: 126 [2021-05-02 12:48:21,248 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 12:48:21,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 9001.5ms TimeCoverageRelationStatistics Valid=230, Invalid=12652, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 12:48:21,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 12:48:21,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-05-02 12:48:21,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 12:48:21,254 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 12:48:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:48:21,254 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 12:48:21,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 12:48:21,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 12:48:21,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:48:21,255 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:48:21,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-02 12:48:21,469 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:48:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:48:21,469 INFO L82 PathProgramCache]: Analyzing trace with hash 687509225, now seen corresponding path program 54 times [2021-05-02 12:48:21,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:48:21,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117379848] [2021-05-02 12:48:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:48:21,479 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:48:21,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922140288] [2021-05-02 12:48:21,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:48:21,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 12:48:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:48:21,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 227 conjunts are in the unsatisfiable core [2021-05-02 12:48:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:48:35,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:35,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:35,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:35,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:48:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:48:36,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:48:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117379848] [2021-05-02 12:48:36,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:48:36,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922140288] [2021-05-02 12:48:36,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922140288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:48:36,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:48:36,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114] total 114 [2021-05-02 12:48:36,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546829576] [2021-05-02 12:48:36,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 12:48:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:48:36,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 12:48:36,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=12656, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 12:48:36,316 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:48:49,562 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 12:48:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 12:48:49,564 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 12:48:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:48:49,565 INFO L225 Difference]: With dead ends: 128 [2021-05-02 12:48:49,565 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 12:48:49,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14967.2ms TimeCoverageRelationStatistics Valid=234, Invalid=13106, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 12:48:49,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 12:48:49,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 12:48:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 12:48:49,572 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 12:48:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:48:49,572 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 12:48:49,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:48:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 12:48:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 12:48:49,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:48:49,573 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:48:49,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:48:49,789 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:48:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:48:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 373397127, now seen corresponding path program 55 times [2021-05-02 12:48:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:48:49,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085557347] [2021-05-02 12:48:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:48:49,797 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:48:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740133362] [2021-05-02 12:48:49,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:48:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:48:49,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 231 conjunts are in the unsatisfiable core [2021-05-02 12:48:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:49:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:06,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:49:06,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:49:06,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085557347] [2021-05-02 12:49:06,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:49:06,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740133362] [2021-05-02 12:49:06,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740133362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:49:06,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:49:06,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116] total 116 [2021-05-02 12:49:06,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478150056] [2021-05-02 12:49:06,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 12:49:06,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:49:06,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 12:49:06,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=13110, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 12:49:06,963 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:49:15,147 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 12:49:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 12:49:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 12:49:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:49:15,148 INFO L225 Difference]: With dead ends: 130 [2021-05-02 12:49:15,148 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 12:49:15,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16934.1ms TimeCoverageRelationStatistics Valid=238, Invalid=13568, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 12:49:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 12:49:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 12:49:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 12:49:15,154 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 12:49:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:49:15,154 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 12:49:15,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 12:49:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 12:49:15,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:49:15,155 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:49:15,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:49:15,364 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:49:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:49:15,364 INFO L82 PathProgramCache]: Analyzing trace with hash -840618331, now seen corresponding path program 56 times [2021-05-02 12:49:15,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:49:15,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888426743] [2021-05-02 12:49:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:49:15,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:49:15,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760488194] [2021-05-02 12:49:15,374 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:49:15,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:49:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:49:15,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 235 conjunts are in the unsatisfiable core [2021-05-02 12:49:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:49:32,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:33,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:49:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:49:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:49:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888426743] [2021-05-02 12:49:35,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:49:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760488194] [2021-05-02 12:49:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760488194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:49:35,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:49:35,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118] total 118 [2021-05-02 12:49:35,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190683893] [2021-05-02 12:49:35,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 12:49:35,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:49:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 12:49:35,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=13572, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 12:49:35,298 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:49:52,435 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 12:49:52,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 12:49:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 12:49:52,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:49:52,436 INFO L225 Difference]: With dead ends: 132 [2021-05-02 12:49:52,436 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 12:49:52,437 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19760.8ms TimeCoverageRelationStatistics Valid=242, Invalid=14038, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 12:49:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 12:49:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 12:49:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 12:49:52,442 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 12:49:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:49:52,442 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 12:49:52,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:49:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 12:49:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 12:49:52,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:49:52,443 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:49:52,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:49:52,643 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:49:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:49:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 721631043, now seen corresponding path program 57 times [2021-05-02 12:49:52,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:49:52,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540571632] [2021-05-02 12:49:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:49:52,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:49:52,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237209932] [2021-05-02 12:49:52,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:49:52,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 12:49:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:49:52,785 WARN L261 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 239 conjunts are in the unsatisfiable core [2021-05-02 12:49:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:50:10,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:11,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:11,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:11,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:50:12,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:50:12,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540571632] [2021-05-02 12:50:12,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:50:12,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237209932] [2021-05-02 12:50:12,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237209932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:50:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:50:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120] total 120 [2021-05-02 12:50:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480393831] [2021-05-02 12:50:12,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 12:50:12,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:50:12,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 12:50:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=14042, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 12:50:12,144 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:50:23,213 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 12:50:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 12:50:23,214 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 12:50:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:50:23,215 INFO L225 Difference]: With dead ends: 134 [2021-05-02 12:50:23,215 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 12:50:23,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 19714.0ms TimeCoverageRelationStatistics Valid=246, Invalid=14516, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 12:50:23,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 12:50:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-02 12:50:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 12:50:23,221 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 12:50:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:50:23,221 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 12:50:23,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 12:50:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 12:50:23,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:50:23,222 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:50:23,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-02 12:50:23,439 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:50:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:50:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1195274143, now seen corresponding path program 58 times [2021-05-02 12:50:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:50:23,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318228438] [2021-05-02 12:50:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:50:23,446 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:50:23,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283826319] [2021-05-02 12:50:23,446 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:50:23,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:50:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:50:23,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 243 conjunts are in the unsatisfiable core [2021-05-02 12:50:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:50:35,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:35,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:35,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:35,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:50:36,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:50:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318228438] [2021-05-02 12:50:36,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:50:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283826319] [2021-05-02 12:50:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283826319] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:50:36,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:50:36,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122] total 122 [2021-05-02 12:50:36,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505188985] [2021-05-02 12:50:36,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 12:50:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:50:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 12:50:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=14520, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 12:50:36,336 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:50:45,639 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 12:50:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 12:50:45,640 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 12:50:45,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:50:45,640 INFO L225 Difference]: With dead ends: 136 [2021-05-02 12:50:45,640 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 12:50:45,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12731.7ms TimeCoverageRelationStatistics Valid=250, Invalid=15002, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 12:50:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 12:50:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 12:50:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 12:50:45,646 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 12:50:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:50:45,646 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 12:50:45,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:50:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 12:50:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 12:50:45,647 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:50:45,647 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:50:45,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:50:45,853 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:50:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:50:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash -800187905, now seen corresponding path program 59 times [2021-05-02 12:50:45,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:50:45,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963021399] [2021-05-02 12:50:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:50:45,860 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:50:45,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618188050] [2021-05-02 12:50:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:50:45,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-05-02 12:50:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:50:45,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 247 conjunts are in the unsatisfiable core [2021-05-02 12:50:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:50:58,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:58,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:58,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:50:59,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:50:59,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:50:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963021399] [2021-05-02 12:50:59,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:50:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618188050] [2021-05-02 12:50:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618188050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:50:59,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:50:59,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124] total 124 [2021-05-02 12:50:59,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273294360] [2021-05-02 12:50:59,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 12:50:59,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:50:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 12:50:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=15006, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 12:50:59,402 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:09,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:51:09,369 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 12:51:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 12:51:09,370 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 12:51:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:51:09,371 INFO L225 Difference]: With dead ends: 138 [2021-05-02 12:51:09,371 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 12:51:09,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13443.5ms TimeCoverageRelationStatistics Valid=254, Invalid=15496, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 12:51:09,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 12:51:09,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 12:51:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 12:51:09,376 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 12:51:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:51:09,376 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 12:51:09,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 12:51:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 12:51:09,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:51:09,377 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:51:09,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-02 12:51:09,581 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:51:09,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:51:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash 920564765, now seen corresponding path program 60 times [2021-05-02 12:51:09,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:51:09,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177968484] [2021-05-02 12:51:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:51:09,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:51:09,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652785775] [2021-05-02 12:51:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:51:09,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-05-02 12:51:09,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:51:09,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 254 conjunts are in the unsatisfiable core [2021-05-02 12:51:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:51:09,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:09,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:21,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:22,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:22,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:51:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:51:22,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:51:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177968484] [2021-05-02 12:51:22,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:51:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652785775] [2021-05-02 12:51:22,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652785775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:51:22,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:51:22,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127] total 127 [2021-05-02 12:51:22,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746409531] [2021-05-02 12:51:22,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 12:51:22,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:51:22,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 12:51:22,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=15750, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 12:51:22,675 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:51:58,129 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 12:51:58,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 12:51:58,131 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-02 12:51:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:51:58,132 INFO L225 Difference]: With dead ends: 140 [2021-05-02 12:51:58,132 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 12:51:58,134 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7627 ImplicationChecksByTransitivity, 37100.2ms TimeCoverageRelationStatistics Valid=754, Invalid=61996, Unknown=0, NotChecked=0, Total=62750 [2021-05-02 12:51:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 12:51:58,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 12:51:58,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:58,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-02 12:51:58,139 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-02 12:51:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:51:58,139 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-02 12:51:58,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:51:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-02 12:51:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 12:51:58,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:51:58,139 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:51:58,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:51:58,340 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:51:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:51:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1001471675, now seen corresponding path program 61 times [2021-05-02 12:51:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:51:58,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207904368] [2021-05-02 12:51:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:51:58,346 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:51:58,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682045016] [2021-05-02 12:51:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:51:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:51:58,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 255 conjunts are in the unsatisfiable core [2021-05-02 12:51:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:52:21,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:21,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:21,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:52:22,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:52:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207904368] [2021-05-02 12:52:22,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:52:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682045016] [2021-05-02 12:52:22,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682045016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:52:22,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:52:22,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128] total 128 [2021-05-02 12:52:22,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183227811] [2021-05-02 12:52:22,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 12:52:22,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:52:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 12:52:22,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=16002, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 12:52:22,936 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:52:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:52:36,969 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 12:52:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 12:52:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 12:52:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:52:36,971 INFO L225 Difference]: With dead ends: 142 [2021-05-02 12:52:36,971 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 12:52:36,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25106.7ms TimeCoverageRelationStatistics Valid=262, Invalid=16508, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 12:52:36,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 12:52:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 12:52:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:52:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-02 12:52:36,976 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-02 12:52:36,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:52:36,976 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-02 12:52:36,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:52:36,977 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-02 12:52:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 12:52:36,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:52:36,977 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:52:37,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:52:37,193 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:52:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:52:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1443600857, now seen corresponding path program 62 times [2021-05-02 12:52:37,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:52:37,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561863134] [2021-05-02 12:52:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:52:37,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:52:37,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078009998] [2021-05-02 12:52:37,199 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:52:37,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:52:37,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:52:37,278 WARN L261 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 259 conjunts are in the unsatisfiable core [2021-05-02 12:52:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:52:57,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:57,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:57,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:57,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:52:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:52:58,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:52:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561863134] [2021-05-02 12:52:58,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:52:58,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078009998] [2021-05-02 12:52:58,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078009998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:52:58,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:52:58,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130] total 130 [2021-05-02 12:52:58,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363825107] [2021-05-02 12:52:58,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 12:52:58,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:52:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 12:52:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=16512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 12:52:58,921 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:53:14,248 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 12:53:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 12:53:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-02 12:53:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:53:14,250 INFO L225 Difference]: With dead ends: 144 [2021-05-02 12:53:14,250 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 12:53:14,251 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22372.6ms TimeCoverageRelationStatistics Valid=266, Invalid=17026, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 12:53:14,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 12:53:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-02 12:53:14,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-02 12:53:14,255 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-02 12:53:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:53:14,256 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-02 12:53:14,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:14,256 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-02 12:53:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 12:53:14,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:53:14,256 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:53:14,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:53:14,461 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:53:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:53:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1127982455, now seen corresponding path program 63 times [2021-05-02 12:53:14,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:53:14,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383287936] [2021-05-02 12:53:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:53:14,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:53:14,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665804318] [2021-05-02 12:53:14,468 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:53:14,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-05-02 12:53:14,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:53:14,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 263 conjunts are in the unsatisfiable core [2021-05-02 12:53:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:53:35,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:53:36,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:53:36,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:53:36,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:53:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:53:37,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:53:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383287936] [2021-05-02 12:53:37,130 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:53:37,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665804318] [2021-05-02 12:53:37,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665804318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:53:37,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:53:37,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132] total 132 [2021-05-02 12:53:37,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726392353] [2021-05-02 12:53:37,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 12:53:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:53:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 12:53:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=17030, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 12:53:37,131 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:52,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:53:52,550 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 12:53:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 12:53:52,551 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-02 12:53:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:53:52,552 INFO L225 Difference]: With dead ends: 146 [2021-05-02 12:53:52,552 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 12:53:52,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22504.9ms TimeCoverageRelationStatistics Valid=270, Invalid=17552, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 12:53:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 12:53:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 12:53:52,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:52,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-02 12:53:52,557 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-02 12:53:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:53:52,557 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-02 12:53:52,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:53:52,558 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-02 12:53:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 12:53:52,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:53:52,558 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:53:52,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-02 12:53:52,774 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:53:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:53:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1533591147, now seen corresponding path program 64 times [2021-05-02 12:53:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:53:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332945666] [2021-05-02 12:53:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:53:52,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:53:52,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394674153] [2021-05-02 12:53:52,781 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:53:52,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:53:52,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:53:52,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 267 conjunts are in the unsatisfiable core [2021-05-02 12:53:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:54:31,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:54:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:54:32,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:54:32,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:54:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:54:33,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:54:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332945666] [2021-05-02 12:54:33,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:54:33,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394674153] [2021-05-02 12:54:33,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394674153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:54:33,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:54:33,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134] total 134 [2021-05-02 12:54:33,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551881706] [2021-05-02 12:54:33,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 12:54:33,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:54:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 12:54:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=17556, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 12:54:33,801 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:54:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:54:55,798 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 12:54:55,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 12:54:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-02 12:54:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:54:55,801 INFO L225 Difference]: With dead ends: 148 [2021-05-02 12:54:55,801 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 12:54:55,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42007.4ms TimeCoverageRelationStatistics Valid=274, Invalid=18086, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 12:54:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 12:54:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 12:54:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:54:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-02 12:54:55,807 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-02 12:54:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:54:55,807 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-02 12:54:55,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:54:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-02 12:54:55,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 12:54:55,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:54:55,807 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:54:56,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-02 12:54:56,008 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:54:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:54:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash 494685747, now seen corresponding path program 65 times [2021-05-02 12:54:56,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:54:56,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832595767] [2021-05-02 12:54:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:54:56,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:54:56,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968681063] [2021-05-02 12:54:56,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:54:56,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 12:54:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:54:56,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 271 conjunts are in the unsatisfiable core [2021-05-02 12:54:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:55:22,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:55:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:55:22,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:55:22,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:55:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:55:24,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:55:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832595767] [2021-05-02 12:55:24,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:55:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968681063] [2021-05-02 12:55:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968681063] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:55:24,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:55:24,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136] total 136 [2021-05-02 12:55:24,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618211816] [2021-05-02 12:55:24,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 12:55:24,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:55:24,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 12:55:24,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=18090, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 12:55:24,112 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:55:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:55:43,522 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 12:55:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 12:55:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 12:55:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:55:43,525 INFO L225 Difference]: With dead ends: 150 [2021-05-02 12:55:43,525 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 12:55:43,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28039.6ms TimeCoverageRelationStatistics Valid=278, Invalid=18628, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 12:55:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 12:55:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 12:55:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:55:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-02 12:55:43,530 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-02 12:55:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:55:43,531 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-02 12:55:43,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:55:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-02 12:55:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 12:55:43,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:55:43,531 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:55:43,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-02 12:55:43,732 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:55:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:55:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash -246371503, now seen corresponding path program 66 times [2021-05-02 12:55:43,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:55:43,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648535455] [2021-05-02 12:55:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:55:43,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 12:55:43,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350735993] [2021-05-02 12:55:43,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:55:44,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-05-02 12:55:44,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:55:44,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 275 conjunts are in the unsatisfiable core [2021-05-02 12:55:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:56:30,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:56:31,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:56:31,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:56:31,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:56:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:56:33,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:56:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648535455] [2021-05-02 12:56:33,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 12:56:33,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350735993] [2021-05-02 12:56:33,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350735993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:56:33,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:56:33,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138] total 138 [2021-05-02 12:56:33,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328823295] [2021-05-02 12:56:33,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 12:56:33,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:56:33,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 12:56:33,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=18632, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 12:56:33,059 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)