/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:10:42,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:10:42,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:10:42,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:10:42,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:10:42,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:10:42,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:10:42,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:10:42,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:10:42,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:10:42,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:10:42,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:10:42,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:10:42,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:10:42,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:10:42,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:10:42,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:10:42,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:10:42,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:10:42,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:10:42,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:10:42,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:10:42,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:10:42,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:10:42,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:10:42,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:10:42,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:10:42,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:10:42,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:10:42,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:10:42,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:10:42,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:10:42,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:10:42,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:10:42,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:10:42,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:10:42,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:10:42,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:10:42,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:10:42,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:10:42,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:10:42,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:10:42,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:10:42,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:10:42,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:10:42,688 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:10:42,688 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:10:42,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:10:42,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:10:42,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:10:42,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:10:42,989 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:10:42,990 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2021-05-06 09:10:43,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0694a86/f60a0c4b690548c0bb906186fa40291a/FLAG8dd11bae6 [2021-05-06 09:10:43,415 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:10:43,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c [2021-05-06 09:10:43,421 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0694a86/f60a0c4b690548c0bb906186fa40291a/FLAG8dd11bae6 [2021-05-06 09:10:43,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a0694a86/f60a0c4b690548c0bb906186fa40291a [2021-05-06 09:10:43,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:10:43,441 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:10:43,445 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:10:43,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:10:43,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:10:43,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f89fbf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43, skipping insertion in model container [2021-05-06 09:10:43,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:10:43,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:10:43,590 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2021-05-06 09:10:43,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:10:43,611 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:10:43,621 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2021-05-06 09:10:43,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:10:43,663 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:10:43,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43 WrapperNode [2021-05-06 09:10:43,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:10:43,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:10:43,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:10:43,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:10:43,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... [2021-05-06 09:10:43,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:10:43,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:10:43,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:10:43,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:10:43,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:10:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:10:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:10:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:10:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:10:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:10:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:10:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:10:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:10:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:10:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:10:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:10:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:10:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:10:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:10:44,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:10:44,017 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:10:44,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:10:44 BoogieIcfgContainer [2021-05-06 09:10:44,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:10:44,019 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:10:44,019 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:10:44,019 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:10:44,021 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:10:44" (1/1) ... [2021-05-06 09:10:44,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:10:44 BasicIcfg [2021-05-06 09:10:44,032 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:10:44,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:10:44,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:10:44,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:10:44,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:10:43" (1/4) ... [2021-05-06 09:10:44,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f527a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:10:44, skipping insertion in model container [2021-05-06 09:10:44,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:10:43" (2/4) ... [2021-05-06 09:10:44,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f527a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:10:44, skipping insertion in model container [2021-05-06 09:10:44,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:10:44" (3/4) ... [2021-05-06 09:10:44,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f527a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:10:44, skipping insertion in model container [2021-05-06 09:10:44,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:10:44" (4/4) ... [2021-05-06 09:10:44,037 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.cJordan [2021-05-06 09:10:44,040 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:10:44,067 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:10:44,078 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:10:44,090 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:10:44,091 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:10:44,091 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:10:44,091 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:10:44,091 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:10:44,091 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:10:44,091 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:10:44,091 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:10:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 09:10:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 09:10:44,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:44,110 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:44,110 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:44,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:44,114 INFO L82 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2021-05-06 09:10:44,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:44,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175416375] [2021-05-06 09:10:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:10:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:10:44,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:44,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175416375] [2021-05-06 09:10:44,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175416375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:44,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:44,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:10:44,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738512236] [2021-05-06 09:10:44,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:10:44,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:10:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:10:44,326 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:44,405 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-06 09:10:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:10:44,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 09:10:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:44,411 INFO L225 Difference]: With dead ends: 32 [2021-05-06 09:10:44,411 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 09:10:44,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:10:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 09:10:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 09:10:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:10:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-06 09:10:44,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-06 09:10:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:44,435 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-06 09:10:44,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-06 09:10:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 09:10:44,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:44,435 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:44,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:10:44,436 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2021-05-06 09:10:44,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:44,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093794232] [2021-05-06 09:10:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:10:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:10:44,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093794232] [2021-05-06 09:10:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093794232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:44,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:44,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:10:44,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417764998] [2021-05-06 09:10:44,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:44,540 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:44,757 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-05-06 09:10:44,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:10:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 09:10:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:44,759 INFO L225 Difference]: With dead ends: 39 [2021-05-06 09:10:44,759 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 09:10:44,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 09:10:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-06 09:10:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:10:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 09:10:44,771 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-06 09:10:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:44,772 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 09:10:44,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 09:10:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 09:10:44,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:44,774 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:44,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:10:44,775 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2021-05-06 09:10:44,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:44,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131149568] [2021-05-06 09:10:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:10:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:10:44,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131149568] [2021-05-06 09:10:44,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131149568] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:44,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:44,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:10:44,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149233811] [2021-05-06 09:10:44,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:10:44,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:44,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:10:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:44,880 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:44,959 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 09:10:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:10:44,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 09:10:44,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:44,961 INFO L225 Difference]: With dead ends: 32 [2021-05-06 09:10:44,962 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 09:10:44,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 09:10:44,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 09:10:44,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:10:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 09:10:44,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-06 09:10:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:44,970 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 09:10:44,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 09:10:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 09:10:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:10:44,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:44,971 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:44,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:10:44,971 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2021-05-06 09:10:44,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:44,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377460997] [2021-05-06 09:10:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:10:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:45,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 09:10:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:10:45,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:45,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377460997] [2021-05-06 09:10:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377460997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:10:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112588460] [2021-05-06 09:10:45,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:45,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:45,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:45,035 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:10:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:45,220 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:10:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:10:45,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 09:10:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:45,223 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:10:45,223 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:10:45,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:10:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-06 09:10:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 09:10:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-06 09:10:45,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-06 09:10:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:45,235 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-06 09:10:45,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 09:10:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-06 09:10:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:10:45,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:45,236 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:45,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 09:10:45,236 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:45,237 INFO L82 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2021-05-06 09:10:45,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:45,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723705721] [2021-05-06 09:10:45,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:45,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:45,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596110676] [2021-05-06 09:10:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:10:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:45,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:10:45,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:45,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723705721] [2021-05-06 09:10:45,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596110676] [2021-05-06 09:10:45,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596110676] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:45,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:45,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:10:45,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660436882] [2021-05-06 09:10:45,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:10:45,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:10:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:45,507 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:10:45,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:45,571 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 09:10:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:10:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:10:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:45,572 INFO L225 Difference]: With dead ends: 51 [2021-05-06 09:10:45,572 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 09:10:45,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 09:10:45,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 09:10:45,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:10:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 09:10:45,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2021-05-06 09:10:45,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:45,576 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 09:10:45,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:10:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 09:10:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 09:10:45,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:45,577 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:45,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:45,787 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2021-05-06 09:10:45,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:45,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109032329] [2021-05-06 09:10:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:45,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:45,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222511576] [2021-05-06 09:10:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:10:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:10:45,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109032329] [2021-05-06 09:10:45,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:45,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222511576] [2021-05-06 09:10:45,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222511576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:45,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:45,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:10:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065882048] [2021-05-06 09:10:45,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:10:45,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:10:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:45,962 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:10:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:45,986 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2021-05-06 09:10:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:10:45,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 09:10:45,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:45,989 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:10:45,989 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 09:10:45,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 09:10:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-06 09:10:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 09:10:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-06 09:10:46,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-06 09:10:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:46,001 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-06 09:10:46,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:10:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-06 09:10:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 09:10:46,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:46,002 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:46,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:46,220 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2021-05-06 09:10:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:46,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668960863] [2021-05-06 09:10:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:46,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:46,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69111767] [2021-05-06 09:10:46,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:10:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:46,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:10:46,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:46,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668960863] [2021-05-06 09:10:46,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:46,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69111767] [2021-05-06 09:10:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69111767] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:46,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:46,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:10:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303728602] [2021-05-06 09:10:46,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:10:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:10:46,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:46,359 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:10:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:46,401 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-05-06 09:10:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:10:46,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 09:10:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:46,402 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:10:46,402 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:10:46,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:10:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 09:10:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:10:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-06 09:10:46,405 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-06 09:10:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:46,406 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-06 09:10:46,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:10:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-06 09:10:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 09:10:46,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:46,407 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:46,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:46,623 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2021-05-06 09:10:46,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:46,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904208224] [2021-05-06 09:10:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:46,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:46,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133172687] [2021-05-06 09:10:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:10:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:46,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-06 09:10:46,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:46,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904208224] [2021-05-06 09:10:46,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133172687] [2021-05-06 09:10:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133172687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:46,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:46,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:10:46,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346277184] [2021-05-06 09:10:46,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:10:46,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:46,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:10:46,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:10:46,756 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:10:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:46,778 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-05-06 09:10:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:10:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 09:10:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:46,780 INFO L225 Difference]: With dead ends: 65 [2021-05-06 09:10:46,780 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 09:10:46,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 09:10:46,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 09:10:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:10:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-06 09:10:46,784 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-06 09:10:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:46,784 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-06 09:10:46,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 09:10:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-06 09:10:46,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 09:10:46,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:46,785 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:47,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,001 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2021-05-06 09:10:47,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676928104] [2021-05-06 09:10:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:47,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:47,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332856113] [2021-05-06 09:10:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:47,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:10:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:47,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:10:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:47,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676928104] [2021-05-06 09:10:47,177 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:47,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332856113] [2021-05-06 09:10:47,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332856113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:47,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:47,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:10:47,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900544085] [2021-05-06 09:10:47,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:47,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:47,178 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:10:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:47,256 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2021-05-06 09:10:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:10:47,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 09:10:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:47,257 INFO L225 Difference]: With dead ends: 94 [2021-05-06 09:10:47,258 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 09:10:47,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 09:10:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-05-06 09:10:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 09:10:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-05-06 09:10:47,263 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 40 [2021-05-06 09:10:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:47,263 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-05-06 09:10:47,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 09:10:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-05-06 09:10:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 09:10:47,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:47,265 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:47,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,469 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2021-05-06 09:10:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:47,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39855402] [2021-05-06 09:10:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:47,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:47,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199341820] [2021-05-06 09:10:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:47,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:10:47,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:47,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 09:10:47,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:47,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39855402] [2021-05-06 09:10:47,642 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:47,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199341820] [2021-05-06 09:10:47,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199341820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:47,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:47,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:10:47,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548712010] [2021-05-06 09:10:47,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:47,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:47,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:47,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:47,643 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 09:10:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:47,678 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-05-06 09:10:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:10:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 09:10:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:47,680 INFO L225 Difference]: With dead ends: 98 [2021-05-06 09:10:47,680 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 09:10:47,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 09:10:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-06 09:10:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.180327868852459) internal successors, (72), 64 states have internal predecessors, (72), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 09:10:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-05-06 09:10:47,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 53 [2021-05-06 09:10:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:47,686 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-05-06 09:10:47,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 09:10:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-05-06 09:10:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:10:47,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:47,687 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:47,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,893 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:47,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:47,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1861566377, now seen corresponding path program 2 times [2021-05-06 09:10:47,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:47,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536688107] [2021-05-06 09:10:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:47,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:47,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54563222] [2021-05-06 09:10:47,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:47,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:10:47,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:10:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:47,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:47,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 09:10:48,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:48,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536688107] [2021-05-06 09:10:48,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:48,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54563222] [2021-05-06 09:10:48,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54563222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:48,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:48,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:10:48,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431207263] [2021-05-06 09:10:48,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:48,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:48,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:48,081 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 09:10:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:48,127 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-05-06 09:10:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:10:48,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-06 09:10:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:48,129 INFO L225 Difference]: With dead ends: 99 [2021-05-06 09:10:48,129 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 09:10:48,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 09:10:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 09:10:48,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 66 states have internal predecessors, (74), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 09:10:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-05-06 09:10:48,134 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 55 [2021-05-06 09:10:48,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:48,135 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-05-06 09:10:48,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 09:10:48,135 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-05-06 09:10:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:10:48,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:48,135 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:48,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:48,349 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:48,349 INFO L82 PathProgramCache]: Analyzing trace with hash 168202861, now seen corresponding path program 2 times [2021-05-06 09:10:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:48,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078591309] [2021-05-06 09:10:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:48,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:48,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740962904] [2021-05-06 09:10:48,355 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:48,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:10:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:10:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:10:48,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:48,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078591309] [2021-05-06 09:10:48,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:48,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740962904] [2021-05-06 09:10:48,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740962904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:48,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:48,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:10:48,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26989841] [2021-05-06 09:10:48,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:10:48,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:10:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:48,563 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:48,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:48,697 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2021-05-06 09:10:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:10:48,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2021-05-06 09:10:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:48,701 INFO L225 Difference]: With dead ends: 143 [2021-05-06 09:10:48,701 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:10:48,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:10:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-05-06 09:10:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 85 states have internal predecessors, (99), 34 states have call successors, (34), 14 states have call predecessors, (34), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:10:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2021-05-06 09:10:48,709 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 58 [2021-05-06 09:10:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:48,709 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2021-05-06 09:10:48,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:48,710 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2021-05-06 09:10:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 09:10:48,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:48,710 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:48,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 09:10:48,913 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:48,914 INFO L82 PathProgramCache]: Analyzing trace with hash -454321759, now seen corresponding path program 1 times [2021-05-06 09:10:48,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:48,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909291897] [2021-05-06 09:10:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:48,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851508145] [2021-05-06 09:10:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:10:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 09:10:49,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909291897] [2021-05-06 09:10:49,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:49,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851508145] [2021-05-06 09:10:49,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851508145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:49,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:49,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:10:49,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197373636] [2021-05-06 09:10:49,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:10:49,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:49,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:10:49,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:49,087 INFO L87 Difference]: Start difference. First operand 129 states and 164 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:49,154 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-05-06 09:10:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:10:49,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 62 [2021-05-06 09:10:49,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:49,156 INFO L225 Difference]: With dead ends: 150 [2021-05-06 09:10:49,156 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 09:10:49,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 09:10:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-06 09:10:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 100 states have internal predecessors, (112), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:10:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2021-05-06 09:10:49,166 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 62 [2021-05-06 09:10:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:49,167 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2021-05-06 09:10:49,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2021-05-06 09:10:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 09:10:49,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:49,168 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:49,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:49,381 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:49,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2021-05-06 09:10:49,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:49,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644963053] [2021-05-06 09:10:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:49,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:49,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336320150] [2021-05-06 09:10:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:10:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:10:49,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:49,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644963053] [2021-05-06 09:10:49,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:49,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336320150] [2021-05-06 09:10:49,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336320150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:49,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:49,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:10:49,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009473207] [2021-05-06 09:10:49,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:10:49,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:49,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:10:49,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:49,657 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 09:10:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:49,731 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2021-05-06 09:10:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:10:49,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 09:10:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:49,733 INFO L225 Difference]: With dead ends: 155 [2021-05-06 09:10:49,733 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 09:10:49,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 09:10:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-05-06 09:10:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 103 states have internal predecessors, (115), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:10:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2021-05-06 09:10:49,737 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 62 [2021-05-06 09:10:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:49,737 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2021-05-06 09:10:49,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 09:10:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2021-05-06 09:10:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 09:10:49,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:49,738 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:49,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:49,953 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:49,953 INFO L82 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2021-05-06 09:10:49,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:49,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726124504] [2021-05-06 09:10:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:49,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:49,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412681414] [2021-05-06 09:10:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:10:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:10:50,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:50,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726124504] [2021-05-06 09:10:50,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:50,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412681414] [2021-05-06 09:10:50,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412681414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:50,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:50,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:10:50,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647916637] [2021-05-06 09:10:50,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:10:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:10:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:50,158 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 09:10:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:50,242 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2021-05-06 09:10:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:10:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 73 [2021-05-06 09:10:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:50,243 INFO L225 Difference]: With dead ends: 159 [2021-05-06 09:10:50,243 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 09:10:50,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:10:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 09:10:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 09:10:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 84 states have internal predecessors, (96), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 09:10:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-05-06 09:10:50,247 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 73 [2021-05-06 09:10:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:50,247 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-05-06 09:10:50,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 09:10:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-05-06 09:10:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 09:10:50,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:50,248 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:50,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:10:50,453 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2088538806, now seen corresponding path program 3 times [2021-05-06 09:10:50,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:50,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637229925] [2021-05-06 09:10:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:50,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:50,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600296108] [2021-05-06 09:10:50,464 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:50,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:10:50,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:50,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:10:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 09:10:50,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637229925] [2021-05-06 09:10:50,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:50,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600296108] [2021-05-06 09:10:50,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600296108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:50,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:50,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:10:50,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651404559] [2021-05-06 09:10:50,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:10:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:10:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:50,655 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 09:10:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:50,713 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:10:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:10:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 09:10:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:50,722 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:10:50,723 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:10:50,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:10:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:10:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.180722891566265) internal successors, (98), 86 states have internal predecessors, (98), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 09:10:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-05-06 09:10:50,728 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 73 [2021-05-06 09:10:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:50,728 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-05-06 09:10:50,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 09:10:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-05-06 09:10:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 09:10:50,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:50,729 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:50,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:10:50,945 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -57233490, now seen corresponding path program 3 times [2021-05-06 09:10:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:50,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588555606] [2021-05-06 09:10:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:50,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:50,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590407355] [2021-05-06 09:10:50,950 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:51,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:10:51,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:10:51,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:51,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 72 proven. 7 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 09:10:51,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:51,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588555606] [2021-05-06 09:10:51,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:51,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590407355] [2021-05-06 09:10:51,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590407355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:51,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:51,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:10:51,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010523560] [2021-05-06 09:10:51,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:10:51,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:10:51,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:51,199 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:51,333 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-05-06 09:10:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:10:51,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 76 [2021-05-06 09:10:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:51,334 INFO L225 Difference]: With dead ends: 158 [2021-05-06 09:10:51,334 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 09:10:51,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:10:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 09:10:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2021-05-06 09:10:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 102 states have internal predecessors, (118), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 09:10:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2021-05-06 09:10:51,339 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 76 [2021-05-06 09:10:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:51,339 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2021-05-06 09:10:51,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 09:10:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2021-05-06 09:10:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 09:10:51,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:51,340 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:51,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 09:10:51,553 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1413927326, now seen corresponding path program 2 times [2021-05-06 09:10:51,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:51,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388384462] [2021-05-06 09:10:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:51,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:51,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054588680] [2021-05-06 09:10:51,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:51,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:10:51,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:51,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:10:51,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:51,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:10:51,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388384462] [2021-05-06 09:10:51,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054588680] [2021-05-06 09:10:51,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054588680] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:51,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:51,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:10:51,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652665935] [2021-05-06 09:10:51,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:10:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:10:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:51,767 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 09:10:51,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:51,827 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-06 09:10:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:10:51,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 09:10:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:51,828 INFO L225 Difference]: With dead ends: 180 [2021-05-06 09:10:51,828 INFO L226 Difference]: Without dead ends: 180 [2021-05-06 09:10:51,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:10:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-06 09:10:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-06 09:10:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 117 states have (on average 1.1538461538461537) internal successors, (135), 120 states have internal predecessors, (135), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 09:10:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 210 transitions. [2021-05-06 09:10:51,832 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 210 transitions. Word has length 80 [2021-05-06 09:10:51,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:51,833 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 210 transitions. [2021-05-06 09:10:51,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 7 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 09:10:51,833 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 210 transitions. [2021-05-06 09:10:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 09:10:51,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:51,833 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:52,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:52,045 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1412825059, now seen corresponding path program 2 times [2021-05-06 09:10:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:52,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181761684] [2021-05-06 09:10:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:52,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:52,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492753168] [2021-05-06 09:10:52,050 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 [2021-05-06 09:10:52,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:10:52,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:52,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:10:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:52,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 21 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:10:52,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:52,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181761684] [2021-05-06 09:10:52,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:52,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492753168] [2021-05-06 09:10:52,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492753168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:52,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:52,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:10:52,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101094796] [2021-05-06 09:10:52,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:10:52,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:10:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:52,259 INFO L87 Difference]: Start difference. First operand 179 states and 210 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:10:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:52,368 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2021-05-06 09:10:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:10:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 80 [2021-05-06 09:10:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:52,370 INFO L225 Difference]: With dead ends: 197 [2021-05-06 09:10:52,370 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 09:10:52,370 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:10:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 09:10:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 09:10:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 128 states have (on average 1.1484375) internal successors, (147), 132 states have internal predecessors, (147), 40 states have call successors, (40), 26 states have call predecessors, (40), 25 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 09:10:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2021-05-06 09:10:52,381 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 80 [2021-05-06 09:10:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:52,381 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2021-05-06 09:10:52,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:10:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2021-05-06 09:10:52,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 09:10:52,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:52,382 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:52,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:52,596 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:52,596 INFO L82 PathProgramCache]: Analyzing trace with hash -468178091, now seen corresponding path program 4 times [2021-05-06 09:10:52,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:52,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119573301] [2021-05-06 09:10:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:52,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:52,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769617654] [2021-05-06 09:10:52,602 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:52,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:10:52,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:10:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 09:10:52,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:52,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119573301] [2021-05-06 09:10:52,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:52,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769617654] [2021-05-06 09:10:52,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769617654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:52,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:52,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:10:52,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237107867] [2021-05-06 09:10:52,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:10:52,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:10:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:10:52,805 INFO L87 Difference]: Start difference. First operand 194 states and 224 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:10:52,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:52,888 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-05-06 09:10:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:10:52,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 91 [2021-05-06 09:10:52,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:52,889 INFO L225 Difference]: With dead ends: 196 [2021-05-06 09:10:52,889 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 09:10:52,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:10:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 09:10:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 09:10:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 40 states have call successors, (40), 26 states have call predecessors, (40), 25 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 09:10:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 226 transitions. [2021-05-06 09:10:52,893 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 226 transitions. Word has length 91 [2021-05-06 09:10:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:52,894 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 226 transitions. [2021-05-06 09:10:52,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:10:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 226 transitions. [2021-05-06 09:10:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:10:52,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:52,894 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:53,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:53,095 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:53,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:53,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2091436208, now seen corresponding path program 3 times [2021-05-06 09:10:53,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:53,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43180175] [2021-05-06 09:10:53,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:53,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:53,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772786902] [2021-05-06 09:10:53,104 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:53,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:10:53,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 09:10:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:53,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:10:53,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43180175] [2021-05-06 09:10:53,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:53,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772786902] [2021-05-06 09:10:53,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772786902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:53,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:53,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:10:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409271696] [2021-05-06 09:10:53,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:10:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:10:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:53,345 INFO L87 Difference]: Start difference. First operand 196 states and 226 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:53,685 INFO L93 Difference]: Finished difference Result 209 states and 242 transitions. [2021-05-06 09:10:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:10:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 94 [2021-05-06 09:10:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:53,686 INFO L225 Difference]: With dead ends: 209 [2021-05-06 09:10:53,686 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 09:10:53,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:10:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 09:10:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 09:10:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 134 states have internal predecessors, (147), 40 states have call successors, (40), 26 states have call predecessors, (40), 25 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 09:10:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2021-05-06 09:10:53,691 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 94 [2021-05-06 09:10:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:53,691 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2021-05-06 09:10:53,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2021-05-06 09:10:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:10:53,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:53,692 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:53,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 09:10:53,895 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:53,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:53,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 3 times [2021-05-06 09:10:53,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:53,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519743260] [2021-05-06 09:10:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:53,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:53,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150567540] [2021-05-06 09:10:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:53,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:10:53,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 09:10:53,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:54,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:10:54,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:54,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519743260] [2021-05-06 09:10:54,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:54,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150567540] [2021-05-06 09:10:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150567540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:54,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:54,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:10:54,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000121941] [2021-05-06 09:10:54,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:10:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:10:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:10:54,188 INFO L87 Difference]: Start difference. First operand 196 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:54,330 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2021-05-06 09:10:54,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:10:54,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 94 [2021-05-06 09:10:54,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:54,333 INFO L225 Difference]: With dead ends: 200 [2021-05-06 09:10:54,333 INFO L226 Difference]: Without dead ends: 179 [2021-05-06 09:10:54,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:10:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-06 09:10:54,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-05-06 09:10:54,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 121 states have internal predecessors, (134), 37 states have call successors, (37), 24 states have call predecessors, (37), 23 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 09:10:54,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 09:10:54,337 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 94 [2021-05-06 09:10:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:54,337 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 09:10:54,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 09:10:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:10:54,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:54,338 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:54,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 09:10:54,545 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1880085295, now seen corresponding path program 1 times [2021-05-06 09:10:54,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:54,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547191952] [2021-05-06 09:10:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:54,556 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:54,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199019018] [2021-05-06 09:10:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:10:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:10:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:54,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 26 proven. 296 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 09:10:54,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:54,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547191952] [2021-05-06 09:10:54,939 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:54,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199019018] [2021-05-06 09:10:54,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199019018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:10:54,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:10:54,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:10:54,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688808600] [2021-05-06 09:10:54,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:10:54,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:10:54,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:10:54,940 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:10:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:55,034 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2021-05-06 09:10:55,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:10:55,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 94 [2021-05-06 09:10:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:55,035 INFO L225 Difference]: With dead ends: 210 [2021-05-06 09:10:55,035 INFO L226 Difference]: Without dead ends: 210 [2021-05-06 09:10:55,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:10:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-06 09:10:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-06 09:10:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 142 states have internal predecessors, (156), 42 states have call successors, (42), 28 states have call predecessors, (42), 27 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 09:10:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2021-05-06 09:10:55,039 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 94 [2021-05-06 09:10:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:55,039 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2021-05-06 09:10:55,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 8 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:10:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2021-05-06 09:10:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:10:55,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:55,048 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:55,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 09:10:55,265 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:55,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1878983028, now seen corresponding path program 1 times [2021-05-06 09:10:55,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021630952] [2021-05-06 09:10:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:55,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:55,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150708652] [2021-05-06 09:10:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-06 09:10:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:10:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:10:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:10:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:10:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-06 09:10:55,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:10:55,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021630952] [2021-05-06 09:10:55,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:10:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150708652] [2021-05-06 09:10:55,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150708652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:10:55,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:10:55,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:10:55,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764099975] [2021-05-06 09:10:55,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:10:55,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:10:55,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:10:55,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:10:55,654 INFO L87 Difference]: Start difference. First operand 209 states and 237 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:10:55,745 INFO L93 Difference]: Finished difference Result 183 states and 206 transitions. [2021-05-06 09:10:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:10:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 94 [2021-05-06 09:10:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:10:55,746 INFO L225 Difference]: With dead ends: 183 [2021-05-06 09:10:55,746 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 09:10:55,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:10:55,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 09:10:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 158. [2021-05-06 09:10:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 106 states have internal predecessors, (114), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 09:10:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 174 transitions. [2021-05-06 09:10:55,750 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 174 transitions. Word has length 94 [2021-05-06 09:10:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:10:55,750 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 174 transitions. [2021-05-06 09:10:55,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 09:10:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 174 transitions. [2021-05-06 09:10:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:10:55,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:10:55,751 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:10:55,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 09:10:55,968 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:10:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:10:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash -951171426, now seen corresponding path program 4 times [2021-05-06 09:10:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:10:55,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969757545] [2021-05-06 09:10:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:10:55,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:10:55,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583576629] [2021-05-06 09:10:55,973 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 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 [2021-05-06 09:10:56,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:10:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:10:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 09:10:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:09,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:09,696 WARN L159 QuantifierPusher]: Ignoring assumption.