/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_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:11:39,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:11:39,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:11:39,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:11:39,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:11:39,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:11:39,652 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:11:39,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:11:39,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:11:39,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:11:39,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:11:39,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:11:39,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:11:39,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:11:39,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:11:39,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:11:39,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:11:39,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:11:39,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:11:39,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:11:39,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:11:39,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:11:39,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:11:39,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:11:39,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:11:39,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:11:39,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:11:39,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:11:39,698 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:11:39,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:11:39,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:11:39,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:11:39,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:11:39,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:11:39,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:11:39,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:11:39,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:11:39,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:11:39,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:11:39,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:11:39,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:11:39,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:11:39,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:11:39,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:11:39,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:11:39,718 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:11:39,718 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:11:40,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:11:40,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:11:40,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:11:40,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:11:40,047 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:11:40,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c [2021-05-06 09:11:40,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ce959f6/e54af5ab97a4415c8394d4455b2e0d66/FLAG4ca84aa27 [2021-05-06 09:11:40,419 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:11:40,419 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound100.c [2021-05-06 09:11:40,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ce959f6/e54af5ab97a4415c8394d4455b2e0d66/FLAG4ca84aa27 [2021-05-06 09:11:40,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ce959f6/e54af5ab97a4415c8394d4455b2e0d66 [2021-05-06 09:11:40,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:11:40,869 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:11:40,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:11:40,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:11:40,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:11:40,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:11:40" (1/1) ... [2021-05-06 09:11:40,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2aa9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:40, skipping insertion in model container [2021-05-06 09:11:40,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:11:40" (1/1) ... [2021-05-06 09:11:40,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:11:40,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:11:41,013 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_unwindbound100.c[526,539] [2021-05-06 09:11:41,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:11:41,031 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:11:41,044 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_unwindbound100.c[526,539] [2021-05-06 09:11:41,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:11:41,069 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:11:41,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41 WrapperNode [2021-05-06 09:11:41,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:11:41,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:11:41,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:11:41,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:11:41,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:11:41,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:11:41,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:11:41,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:11:41,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (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 09:11:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:11:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:11:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:11:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:11:41,207 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:11:41,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:11:41,208 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:11:41,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:11:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:11:41,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:11:41,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:11:41,481 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:11:41,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:11:41 BoogieIcfgContainer [2021-05-06 09:11:41,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:11:41,483 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:11:41,483 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:11:41,484 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:11:41,486 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:11:41" (1/1) ... [2021-05-06 09:11:41,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:11:41 BasicIcfg [2021-05-06 09:11:41,514 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:11:41,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:11:41,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:11:41,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:11:41,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:11:40" (1/4) ... [2021-05-06 09:11:41,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c151be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:11:41, skipping insertion in model container [2021-05-06 09:11:41,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:11:41" (2/4) ... [2021-05-06 09:11:41,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c151be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:11:41, skipping insertion in model container [2021-05-06 09:11:41,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:11:41" (3/4) ... [2021-05-06 09:11:41,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c151be0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:11:41, skipping insertion in model container [2021-05-06 09:11:41,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:11:41" (4/4) ... [2021-05-06 09:11:41,520 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.cJordan [2021-05-06 09:11:41,523 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:11:41,543 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:11:41,558 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:11:41,575 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:11:41,575 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:11:41,575 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:11:41,575 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:11:41,575 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:11:41,575 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:11:41,575 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:11:41,575 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:11:41,586 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 09:11:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 09:11:41,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:41,594 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:11:41,594 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 121155216, now seen corresponding path program 1 times [2021-05-06 09:11:41,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:41,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877657795] [2021-05-06 09:11:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:41,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:11:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:41,738 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 09:11:41,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877657795] [2021-05-06 09:11:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877657795] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:41,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:41,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:11:41,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405742536] [2021-05-06 09:11:41,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:11:41,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:41,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:11:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:11:41,754 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 09:11:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:41,888 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-06 09:11:41,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:11:41,902 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 09:11:41,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:41,907 INFO L225 Difference]: With dead ends: 32 [2021-05-06 09:11:41,907 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 09:11:41,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:11:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 09:11:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 09:11:41,935 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 09:11:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-05-06 09:11:41,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2021-05-06 09:11:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:41,938 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-05-06 09:11:41,939 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 09:11:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-05-06 09:11:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 09:11:41,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:41,940 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:11:41,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:11:41,940 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 152644303, now seen corresponding path program 1 times [2021-05-06 09:11:41,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:41,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159118697] [2021-05-06 09:11:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:11:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,097 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 09:11:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159118697] [2021-05-06 09:11:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159118697] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:42,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:42,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:11:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284777570] [2021-05-06 09:11:42,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:42,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:42,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:42,100 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 09:11:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:42,331 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2021-05-06 09:11:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:11:42,332 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 09:11:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:42,334 INFO L225 Difference]: With dead ends: 39 [2021-05-06 09:11:42,334 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 09:11:42,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:11:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 09:11:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-05-06 09:11:42,346 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 09:11:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 09:11:42,349 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2021-05-06 09:11:42,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:42,349 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 09:11:42,350 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 09:11:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 09:11:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 09:11:42,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:42,352 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:11:42,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:11:42,352 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash -400958603, now seen corresponding path program 1 times [2021-05-06 09:11:42,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:42,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708131917] [2021-05-06 09:11:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:11:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,478 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 09:11:42,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:42,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708131917] [2021-05-06 09:11:42,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708131917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:42,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:42,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 09:11:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151284624] [2021-05-06 09:11:42,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:11:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:11:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:42,480 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 09:11:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:42,573 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2021-05-06 09:11:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:11:42,573 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 09:11:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:42,574 INFO L225 Difference]: With dead ends: 32 [2021-05-06 09:11:42,574 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 09:11:42,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 09:11:42,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 09:11:42,577 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 09:11:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 09:11:42,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2021-05-06 09:11:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:42,577 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 09:11:42,578 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 09:11:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 09:11:42,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:11:42,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:42,578 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:11:42,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:11:42,578 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash 185978583, now seen corresponding path program 1 times [2021-05-06 09:11:42,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:42,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735656764] [2021-05-06 09:11:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:11:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-05-06 09:11:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,635 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 09:11:42,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:42,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735656764] [2021-05-06 09:11:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735656764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:42,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:42,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:11:42,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47134455] [2021-05-06 09:11:42,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:42,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:42,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:42,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:42,637 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 09:11:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:42,812 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:11:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:11:42,813 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 09:11:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:42,813 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:11:42,813 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:11:42,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:11:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:11:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2021-05-06 09:11:42,817 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 09:11:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2021-05-06 09:11:42,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2021-05-06 09:11:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:42,818 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2021-05-06 09:11:42,818 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 09:11:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2021-05-06 09:11:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:11:42,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:42,818 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 09:11:42,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 09:11:42,819 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -820589269, now seen corresponding path program 1 times [2021-05-06 09:11:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:42,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885797591] [2021-05-06 09:11:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:42,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:42,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158557593] [2021-05-06 09:11:42,827 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 09:11:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:11:42,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,007 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 09:11:43,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885797591] [2021-05-06 09:11:43,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:43,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158557593] [2021-05-06 09:11:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158557593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:43,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:43,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:11:43,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393617680] [2021-05-06 09:11:43,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:11:43,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:43,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:11:43,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:43,009 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 09:11:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:43,048 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2021-05-06 09:11:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:11:43,048 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 09:11:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:43,049 INFO L225 Difference]: With dead ends: 51 [2021-05-06 09:11:43,049 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 09:11:43,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 09:11:43,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 09:11:43,053 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 09:11:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 09:11:43,053 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2021-05-06 09:11:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:43,054 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 09:11:43,054 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 09:11:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 09:11:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 09:11:43,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:43,055 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 09:11:43,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:43,272 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1259710898, now seen corresponding path program 1 times [2021-05-06 09:11:43,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:43,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928914410] [2021-05-06 09:11:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:43,278 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:43,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962716152] [2021-05-06 09:11:43,279 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 09:11:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:11:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,503 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 09:11:43,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928914410] [2021-05-06 09:11:43,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:43,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962716152] [2021-05-06 09:11:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962716152] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:43,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:43,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:11:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28866082] [2021-05-06 09:11:43,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:11:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:11:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:43,506 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 09:11:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:43,529 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2021-05-06 09:11:43,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:11:43,530 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 09:11:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:43,531 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:11:43,531 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 09:11:43,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 09:11:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-05-06 09:11:43,534 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 09:11:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-05-06 09:11:43,535 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2021-05-06 09:11:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:43,535 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-05-06 09:11:43,535 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 09:11:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-05-06 09:11:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 09:11:43,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:43,536 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 09:11:43,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:43,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:43,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1260813165, now seen corresponding path program 1 times [2021-05-06 09:11:43,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:43,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911772457] [2021-05-06 09:11:43,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:43,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:43,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394901777] [2021-05-06 09:11:43,762 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 09:11:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:11:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:43,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:43,873 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 09:11:43,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911772457] [2021-05-06 09:11:43,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394901777] [2021-05-06 09:11:43,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394901777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:43,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:43,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:11:43,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125044888] [2021-05-06 09:11:43,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:11:43,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:43,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:11:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:43,875 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 09:11:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:43,911 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2021-05-06 09:11:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:11:43,912 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 09:11:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:43,912 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:11:43,912 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 09:11:43,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 09:11:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 09:11:43,916 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 09:11:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-06 09:11:43,917 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2021-05-06 09:11:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:43,917 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-06 09:11:43,917 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 09:11:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-06 09:11:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 09:11:43,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:43,918 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 09:11:44,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:44,136 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1811137592, now seen corresponding path program 1 times [2021-05-06 09:11:44,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:44,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023002432] [2021-05-06 09:11:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:44,143 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:44,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200651550] [2021-05-06 09:11:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:11:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:11:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:44,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,301 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 09:11:44,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023002432] [2021-05-06 09:11:44,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200651550] [2021-05-06 09:11:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200651550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:44,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:44,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 09:11:44,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640843588] [2021-05-06 09:11:44,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:11:44,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:11:44,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:11:44,305 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 09:11:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:44,339 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-05-06 09:11:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:11:44,343 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 09:11:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:44,346 INFO L225 Difference]: With dead ends: 65 [2021-05-06 09:11:44,346 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 09:11:44,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:44,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 09:11:44,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 09:11:44,358 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 09:11:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2021-05-06 09:11:44,359 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2021-05-06 09:11:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:44,359 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2021-05-06 09:11:44,359 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 09:11:44,359 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2021-05-06 09:11:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 09:11:44,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:44,360 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 09:11:44,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:44,582 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -599722260, now seen corresponding path program 1 times [2021-05-06 09:11:44,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:44,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684153339] [2021-05-06 09:11:44,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:44,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:44,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766120949] [2021-05-06 09:11:44,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:11:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:11:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:44,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:44,755 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 09:11:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684153339] [2021-05-06 09:11:44,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766120949] [2021-05-06 09:11:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766120949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:44,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:44,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:11:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055995575] [2021-05-06 09:11:44,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:44,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:44,756 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 09:11:44,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:44,848 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2021-05-06 09:11:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:11:44,849 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 09:11:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:44,850 INFO L225 Difference]: With dead ends: 94 [2021-05-06 09:11:44,850 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 09:11:44,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 09:11:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-05-06 09:11:44,854 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 09:11:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2021-05-06 09:11:44,855 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 40 [2021-05-06 09:11:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:44,855 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2021-05-06 09:11:44,856 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 09:11:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2021-05-06 09:11:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 09:11:44,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:44,857 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 09:11:45,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:45,079 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash 560903707, now seen corresponding path program 1 times [2021-05-06 09:11:45,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:45,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661289853] [2021-05-06 09:11:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:45,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944357356] [2021-05-06 09:11:45,086 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 09:11:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:45,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:11:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:45,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,239 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 09:11:45,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:45,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661289853] [2021-05-06 09:11:45,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:45,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944357356] [2021-05-06 09:11:45,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944357356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:45,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:45,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:11:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013202905] [2021-05-06 09:11:45,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:45,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:45,241 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 09:11:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:45,276 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-05-06 09:11:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:11:45,277 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 09:11:45,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:45,278 INFO L225 Difference]: With dead ends: 98 [2021-05-06 09:11:45,278 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 09:11:45,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 09:11:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-06 09:11:45,281 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 09:11:45,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-05-06 09:11:45,282 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 53 [2021-05-06 09:11:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:45,282 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-05-06 09:11:45,282 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 09:11:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-05-06 09:11:45,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:11:45,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:45,283 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 09:11:45,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:45,502 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:45,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1861566377, now seen corresponding path program 2 times [2021-05-06 09:11:45,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:45,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125008177] [2021-05-06 09:11:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:45,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:45,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543209201] [2021-05-06 09:11:45,508 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 09:11:45,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:11:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:45,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:11:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:45,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:45,659 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 09:11:45,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125008177] [2021-05-06 09:11:45,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:45,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543209201] [2021-05-06 09:11:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543209201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:45,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:45,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:11:45,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544578047] [2021-05-06 09:11:45,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:45,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:45,661 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 09:11:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:45,702 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2021-05-06 09:11:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:11:45,703 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 09:11:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:45,704 INFO L225 Difference]: With dead ends: 99 [2021-05-06 09:11:45,704 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 09:11:45,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 09:11:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 09:11:45,707 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 09:11:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2021-05-06 09:11:45,708 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 55 [2021-05-06 09:11:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:45,708 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2021-05-06 09:11:45,708 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 09:11:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2021-05-06 09:11:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:11:45,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:45,709 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 09:11:45,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:45,917 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash 168202861, now seen corresponding path program 2 times [2021-05-06 09:11:45,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:45,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166505971] [2021-05-06 09:11:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:45,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:45,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460716215] [2021-05-06 09:11:45,923 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 09:11:45,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:11:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:45,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:11:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,114 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 09:11:46,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166505971] [2021-05-06 09:11:46,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:46,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460716215] [2021-05-06 09:11:46,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460716215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:46,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:46,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:11:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622493361] [2021-05-06 09:11:46,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:11:46,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:11:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:46,116 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 09:11:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:46,241 INFO L93 Difference]: Finished difference Result 143 states and 187 transitions. [2021-05-06 09:11:46,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:11:46,241 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 09:11:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:46,242 INFO L225 Difference]: With dead ends: 143 [2021-05-06 09:11:46,242 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:11:46,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:11:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2021-05-06 09:11:46,246 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 09:11:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 164 transitions. [2021-05-06 09:11:46,247 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 164 transitions. Word has length 58 [2021-05-06 09:11:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 164 transitions. [2021-05-06 09:11:46,248 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 09:11:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 164 transitions. [2021-05-06 09:11:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 09:11:46,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:46,248 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 09:11:46,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 09:11:46,467 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:46,467 INFO L82 PathProgramCache]: Analyzing trace with hash -454321759, now seen corresponding path program 1 times [2021-05-06 09:11:46,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:46,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618189025] [2021-05-06 09:11:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:46,472 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:46,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485109078] [2021-05-06 09:11:46,473 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 09:11:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:11:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:46,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:46,649 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 09:11:46,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618189025] [2021-05-06 09:11:46,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:46,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485109078] [2021-05-06 09:11:46,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485109078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:46,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:46,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:11:46,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137235095] [2021-05-06 09:11:46,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:11:46,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:46,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:11:46,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:46,650 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 09:11:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:46,707 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-05-06 09:11:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:11:46,707 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 09:11:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:46,708 INFO L225 Difference]: With dead ends: 150 [2021-05-06 09:11:46,708 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 09:11:46,708 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 09:11:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-06 09:11:46,713 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 09:11:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2021-05-06 09:11:46,713 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 62 [2021-05-06 09:11:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:46,714 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2021-05-06 09:11:46,714 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 09:11:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2021-05-06 09:11:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 09:11:46,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:46,714 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 09:11:46,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:46,932 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash -453219492, now seen corresponding path program 1 times [2021-05-06 09:11:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:46,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733854331] [2021-05-06 09:11:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:46,938 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:46,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322894637] [2021-05-06 09:11:46,938 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 09:11:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:47,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:11:47,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:47,200 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 09:11:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733854331] [2021-05-06 09:11:47,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:47,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322894637] [2021-05-06 09:11:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322894637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:11:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685049925] [2021-05-06 09:11:47,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:11:47,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:11:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:47,202 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 09:11:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:47,283 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2021-05-06 09:11:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:11:47,286 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 09:11:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:47,287 INFO L225 Difference]: With dead ends: 155 [2021-05-06 09:11:47,287 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 09:11:47,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 09:11:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-05-06 09:11:47,290 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 09:11:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2021-05-06 09:11:47,291 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 62 [2021-05-06 09:11:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:47,291 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2021-05-06 09:11:47,292 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 09:11:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2021-05-06 09:11:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 09:11:47,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:47,292 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 09:11:47,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:47,513 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash 929445032, now seen corresponding path program 1 times [2021-05-06 09:11:47,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:47,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235140257] [2021-05-06 09:11:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:47,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:47,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801655000] [2021-05-06 09:11:47,519 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 09:11:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:11:47,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:47,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:47,727 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 09:11:47,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:47,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235140257] [2021-05-06 09:11:47,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:47,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801655000] [2021-05-06 09:11:47,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801655000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:47,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:47,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:11:47,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951594451] [2021-05-06 09:11:47,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:11:47,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:47,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:11:47,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:47,728 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 09:11:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:47,802 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2021-05-06 09:11:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:11:47,802 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 09:11:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:47,803 INFO L225 Difference]: With dead ends: 159 [2021-05-06 09:11:47,803 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 09:11:47,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:11:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 09:11:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 09:11:47,807 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 09:11:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2021-05-06 09:11:47,808 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 73 [2021-05-06 09:11:47,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:47,808 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2021-05-06 09:11:47,808 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 09:11:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2021-05-06 09:11:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 09:11:47,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:47,809 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 09:11:48,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:11:48,027 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2088538806, now seen corresponding path program 3 times [2021-05-06 09:11:48,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:48,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748497215] [2021-05-06 09:11:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:48,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:48,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229460090] [2021-05-06 09:11:48,033 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 09:11:48,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:11:48,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:48,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 09:11:48,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:48,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,232 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 09:11:48,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:48,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748497215] [2021-05-06 09:11:48,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:48,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229460090] [2021-05-06 09:11:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229460090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:48,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:11:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820666574] [2021-05-06 09:11:48,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:11:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:11:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:48,234 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 09:11:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:48,292 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:11:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:11:48,294 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 09:11:48,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:48,294 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:11:48,295 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:11:48,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:11:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:11:48,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:11:48,298 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 09:11:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-05-06 09:11:48,299 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 73 [2021-05-06 09:11:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:48,299 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-05-06 09:11:48,299 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 09:11:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-05-06 09:11:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 09:11:48,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:48,300 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 09:11:48,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:11:48,519 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -57233490, now seen corresponding path program 3 times [2021-05-06 09:11:48,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:48,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896164376] [2021-05-06 09:11:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:48,529 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:48,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744891379] [2021-05-06 09:11:48,529 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 09:11:48,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:11:48,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 09:11:48,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:48,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:48,784 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 09:11:48,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:48,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896164376] [2021-05-06 09:11:48,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:48,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744891379] [2021-05-06 09:11:48,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744891379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:48,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:48,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:11:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840151297] [2021-05-06 09:11:48,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:11:48,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:11:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:11:48,786 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 09:11:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:48,927 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2021-05-06 09:11:48,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:11:48,928 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 09:11:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:48,928 INFO L225 Difference]: With dead ends: 158 [2021-05-06 09:11:48,928 INFO L226 Difference]: Without dead ends: 158 [2021-05-06 09:11:48,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:11:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-06 09:11:48,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 153. [2021-05-06 09:11:48,932 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 09:11:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2021-05-06 09:11:48,933 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 76 [2021-05-06 09:11:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:48,933 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2021-05-06 09:11:48,933 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 09:11:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2021-05-06 09:11:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 09:11:48,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:48,934 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 09:11:49,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 09:11:49,153 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1413927326, now seen corresponding path program 2 times [2021-05-06 09:11:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:49,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902586275] [2021-05-06 09:11:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:49,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:49,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079802316] [2021-05-06 09:11:49,160 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 09:11:49,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:11:49,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:11:49,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:49,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,375 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 09:11:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902586275] [2021-05-06 09:11:49,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079802316] [2021-05-06 09:11:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079802316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:49,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:49,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:11:49,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107582637] [2021-05-06 09:11:49,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:11:49,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:11:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:49,378 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 09:11:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:49,442 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-06 09:11:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:11:49,442 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 09:11:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:49,443 INFO L225 Difference]: With dead ends: 180 [2021-05-06 09:11:49,443 INFO L226 Difference]: Without dead ends: 180 [2021-05-06 09:11:49,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:11:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-06 09:11:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-06 09:11:49,449 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 09:11:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 210 transitions. [2021-05-06 09:11:49,450 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 210 transitions. Word has length 80 [2021-05-06 09:11:49,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:49,450 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 210 transitions. [2021-05-06 09:11:49,450 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 09:11:49,450 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 210 transitions. [2021-05-06 09:11:49,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 09:11:49,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:49,451 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 09:11:49,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:49,665 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1412825059, now seen corresponding path program 2 times [2021-05-06 09:11:49,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:49,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559955002] [2021-05-06 09:11:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:49,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:49,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95894687] [2021-05-06 09:11:49,673 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 09:11:49,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:11:49,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:11:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:49,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:49,932 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 09:11:49,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559955002] [2021-05-06 09:11:49,932 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95894687] [2021-05-06 09:11:49,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95894687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:49,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:49,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:11:49,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727192489] [2021-05-06 09:11:49,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:11:49,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:11:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:49,933 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 09:11:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:50,058 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2021-05-06 09:11:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:11:50,058 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 09:11:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:50,059 INFO L225 Difference]: With dead ends: 197 [2021-05-06 09:11:50,059 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 09:11:50,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:11:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 09:11:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 09:11:50,063 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 09:11:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 224 transitions. [2021-05-06 09:11:50,064 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 224 transitions. Word has length 80 [2021-05-06 09:11:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:50,065 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 224 transitions. [2021-05-06 09:11:50,065 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 09:11:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 224 transitions. [2021-05-06 09:11:50,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 09:11:50,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:50,066 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 09:11:50,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:50,284 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash -468178091, now seen corresponding path program 4 times [2021-05-06 09:11:50,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:50,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607221601] [2021-05-06 09:11:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:50,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:50,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819620782] [2021-05-06 09:11:50,290 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 09:11:50,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:11:50,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:11:50,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:50,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:50,507 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 09:11:50,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607221601] [2021-05-06 09:11:50,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819620782] [2021-05-06 09:11:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819620782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:50,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:50,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:11:50,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748909731] [2021-05-06 09:11:50,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:11:50,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:50,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:11:50,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:11:50,508 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 09:11:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:50,588 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-05-06 09:11:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:11:50,589 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 09:11:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:50,589 INFO L225 Difference]: With dead ends: 196 [2021-05-06 09:11:50,589 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 09:11:50,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:11:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 09:11:50,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 09:11:50,593 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 09:11:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 226 transitions. [2021-05-06 09:11:50,594 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 226 transitions. Word has length 91 [2021-05-06 09:11:50,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:50,594 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 226 transitions. [2021-05-06 09:11:50,595 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 09:11:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 226 transitions. [2021-05-06 09:11:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:11:50,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:50,595 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 09:11:50,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:11:50,817 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2091436208, now seen corresponding path program 3 times [2021-05-06 09:11:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:50,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010865590] [2021-05-06 09:11:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:50,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:50,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595044757] [2021-05-06 09:11:50,827 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 09:11:50,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:11:50,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 09:11:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:51,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 60 proven. 60 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-06 09:11:51,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010865590] [2021-05-06 09:11:51,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595044757] [2021-05-06 09:11:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595044757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:51,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:51,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:11:51,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918284081] [2021-05-06 09:11:51,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:11:51,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:51,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:11:51,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:11:51,174 INFO L87 Difference]: Start difference. First operand 196 states and 226 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:11:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:51,471 INFO L93 Difference]: Finished difference Result 213 states and 245 transitions. [2021-05-06 09:11:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:11:51,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 94 [2021-05-06 09:11:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:51,472 INFO L225 Difference]: With dead ends: 213 [2021-05-06 09:11:51,472 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 09:11:51,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 09:11:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 09:11:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 09:11:51,477 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 09:11:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 223 transitions. [2021-05-06 09:11:51,477 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 223 transitions. Word has length 94 [2021-05-06 09:11:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:51,478 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 223 transitions. [2021-05-06 09:11:51,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 09:11:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 223 transitions. [2021-05-06 09:11:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:11:51,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:51,478 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 09:11:51,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 09:11:51,681 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2090333941, now seen corresponding path program 3 times [2021-05-06 09:11:51,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:51,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890766383] [2021-05-06 09:11:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:51,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:51,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978108923] [2021-05-06 09:11:51,686 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 09:11:51,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:11:51,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 09:11:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:52,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,037 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 09:11:52,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890766383] [2021-05-06 09:11:52,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978108923] [2021-05-06 09:11:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978108923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:52,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:52,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:11:52,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126523674] [2021-05-06 09:11:52,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:11:52,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:52,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:11:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:11:52,039 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 09:11:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:52,186 INFO L93 Difference]: Finished difference Result 200 states and 226 transitions. [2021-05-06 09:11:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:11:52,187 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 09:11:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:52,188 INFO L225 Difference]: With dead ends: 200 [2021-05-06 09:11:52,188 INFO L226 Difference]: Without dead ends: 179 [2021-05-06 09:11:52,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:11:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-06 09:11:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-05-06 09:11:52,199 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 09:11:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 09:11:52,200 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 94 [2021-05-06 09:11:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:52,200 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 09:11:52,200 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 09:11:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 09:11:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:11:52,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:52,201 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 09:11:52,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 09:11:52,402 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1880085295, now seen corresponding path program 1 times [2021-05-06 09:11:52,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:52,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977341488] [2021-05-06 09:11:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:52,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:52,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274839161] [2021-05-06 09:11:52,407 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 09:11:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:11:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:52,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:52,661 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 09:11:52,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977341488] [2021-05-06 09:11:52,661 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:52,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274839161] [2021-05-06 09:11:52,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274839161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:11:52,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:11:52,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:11:52,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535964907] [2021-05-06 09:11:52,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:11:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:11:52,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:11:52,662 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 09:11:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:52,760 INFO L93 Difference]: Finished difference Result 210 states and 238 transitions. [2021-05-06 09:11:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 09:11:52,761 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 09:11:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:52,762 INFO L225 Difference]: With dead ends: 210 [2021-05-06 09:11:52,762 INFO L226 Difference]: Without dead ends: 210 [2021-05-06 09:11:52,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:11:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-06 09:11:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-06 09:11:52,766 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 09:11:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2021-05-06 09:11:52,767 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 94 [2021-05-06 09:11:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:52,767 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2021-05-06 09:11:52,767 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 09:11:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2021-05-06 09:11:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:11:52,768 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:52,768 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 09:11:52,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 09:11:52,981 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:52,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1878983028, now seen corresponding path program 1 times [2021-05-06 09:11:52,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:52,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926109915] [2021-05-06 09:11:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:52,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:52,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835167076] [2021-05-06 09:11:52,987 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 09:11:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:11:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:11:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:11:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:11:53,249 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 09:11:53,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:11:53,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926109915] [2021-05-06 09:11:53,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:11:53,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835167076] [2021-05-06 09:11:53,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835167076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:11:53,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:11:53,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:11:53,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714985329] [2021-05-06 09:11:53,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:11:53,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:11:53,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:11:53,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:11:53,251 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 09:11:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:11:53,331 INFO L93 Difference]: Finished difference Result 183 states and 206 transitions. [2021-05-06 09:11:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:11:53,331 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 09:11:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:11:53,332 INFO L225 Difference]: With dead ends: 183 [2021-05-06 09:11:53,332 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 09:11:53,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:11:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 09:11:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 158. [2021-05-06 09:11:53,337 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 09:11:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 174 transitions. [2021-05-06 09:11:53,338 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 174 transitions. Word has length 94 [2021-05-06 09:11:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:11:53,338 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 174 transitions. [2021-05-06 09:11:53,338 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 09:11:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 174 transitions. [2021-05-06 09:11:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:11:53,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:11:53,339 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 09:11:53,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 09:11:53,558 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:11:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:11:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash -951171426, now seen corresponding path program 4 times [2021-05-06 09:11:53,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:11:53,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414980124] [2021-05-06 09:11:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:11:53,565 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:11:53,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692394773] [2021-05-06 09:11:53,566 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 09:11:53,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:11:53,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:11:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 09:11:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:12:04,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:12:04,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:12:04,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:12:04,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:12:09,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:12:09,396 WARN L159 QuantifierPusher]: Ignoring assumption.