/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/cohencu-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:30:58,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:30:58,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:30:58,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:30:58,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:30:58,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:30:58,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:30:58,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:30:58,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:30:58,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:30:58,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:30:58,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:30:58,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:30:58,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:30:58,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:30:58,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:30:58,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:30:58,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:30:58,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:30:58,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:30:58,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:30:58,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:30:58,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:30:58,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:30:58,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:30:58,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:30:58,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:30:58,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:30:58,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:30:58,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:30:58,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:30:58,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:30:58,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:30:58,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:30:58,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:58,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:30:58,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:30:58,194 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:30:58,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:30:58,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:30:58,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:30:58,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:30:58,480 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:30:58,480 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:30:58,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2021-05-02 19:30:58,529 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271e6ea01/a53aa270ef4b4419a27d1a8847955a2f/FLAG66390099f [2021-05-02 19:30:58,852 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:30:58,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound100.c [2021-05-02 19:30:58,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271e6ea01/a53aa270ef4b4419a27d1a8847955a2f/FLAG66390099f [2021-05-02 19:30:59,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/271e6ea01/a53aa270ef4b4419a27d1a8847955a2f [2021-05-02 19:30:59,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:30:59,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:30:59,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:59,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:30:59,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:30:59,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc66704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59, skipping insertion in model container [2021-05-02 19:30:59,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:30:59,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:30:59,388 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/cohencu-ll_unwindbound100.c[596,609] [2021-05-02 19:30:59,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:59,414 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:30:59,426 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/cohencu-ll_unwindbound100.c[596,609] [2021-05-02 19:30:59,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:30:59,452 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:30:59,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59 WrapperNode [2021-05-02 19:30:59,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:30:59,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:30:59,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:30:59,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:30:59,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:30:59,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:30:59,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:30:59,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:30:59,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:30:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:30:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:30:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:30:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:30:59,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:30:59,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:30:59,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:30:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:30:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:30:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:30:59,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:30:59,826 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:30:59,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:59 BoogieIcfgContainer [2021-05-02 19:30:59,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:30:59,828 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:30:59,828 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:30:59,828 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:30:59,830 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:59" (1/1) ... [2021-05-02 19:30:59,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:59 BasicIcfg [2021-05-02 19:30:59,862 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:30:59,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:30:59,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:30:59,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:30:59,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:30:59" (1/4) ... [2021-05-02 19:30:59,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a41ff68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:59, skipping insertion in model container [2021-05-02 19:30:59,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:30:59" (2/4) ... [2021-05-02 19:30:59,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a41ff68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:30:59, skipping insertion in model container [2021-05-02 19:30:59,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:30:59" (3/4) ... [2021-05-02 19:30:59,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a41ff68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:30:59, skipping insertion in model container [2021-05-02 19:30:59,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:30:59" (4/4) ... [2021-05-02 19:30:59,869 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound100.cJordan [2021-05-02 19:30:59,872 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:30:59,874 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:30:59,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:30:59,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:30:59,913 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:30:59,913 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:30:59,914 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:30:59,914 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:30:59,914 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:30:59,914 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:30:59,914 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:30:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:30:59,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:30:59,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:30:59,936 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:30:59,936 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:30:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:30:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-02 19:30:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:30:59,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890190338] [2021-05-02 19:30:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:00,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890190338] [2021-05-02 19:31:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890190338] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:31:00,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507703551] [2021-05-02 19:31:00,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:31:00,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:31:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:31:00,202 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:00,329 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-02 19:31:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:31:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:31:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:00,336 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:31:00,336 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:31:00,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:31:00,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:31:00,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 19:31:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-02 19:31:00,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-02 19:31:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:00,376 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-02 19:31:00,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-02 19:31:00,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:31:00,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:00,377 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:00,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:31:00,377 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:00,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-02 19:31:00,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:00,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131202327] [2021-05-02 19:31:00,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131202327] [2021-05-02 19:31:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131202327] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:00,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:00,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:31:00,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133277465] [2021-05-02 19:31:00,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:31:00,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:31:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:31:00,461 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:00,611 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-02 19:31:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:31:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:31:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:00,612 INFO L225 Difference]: With dead ends: 28 [2021-05-02 19:31:00,612 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:31:00,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:31:00,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:31:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-02 19:31:00,617 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-02 19:31:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:00,617 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-02 19:31:00,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:31:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-02 19:31:00,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:31:00,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:00,618 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:00,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:31:00,618 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-02 19:31:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:00,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768467448] [2021-05-02 19:31:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:31:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:00,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:00,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768467448] [2021-05-02 19:31:00,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768467448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:31:00,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:31:00,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:31:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440872818] [2021-05-02 19:31:00,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:31:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:00,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:31:00,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:00,713 INFO L87 Difference]: Start difference. First operand 28 states and 39 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) [2021-05-02 19:31:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:00,989 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 19:31:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:00,990 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 [2021-05-02 19:31:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:00,990 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:31:00,990 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:31:00,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:31:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:31:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:31:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 19:31:00,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 19:31:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:00,995 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 19:31:00,996 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) [2021-05-02 19:31:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 19:31:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:31:00,996 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:00,996 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:00,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:31:00,996 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-02 19:31:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:00,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6012646] [2021-05-02 19:31:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:01,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:01,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489312978] [2021-05-02 19:31:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:31:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:31:01,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6012646] [2021-05-02 19:31:01,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:01,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489312978] [2021-05-02 19:31:01,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489312978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:01,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:01,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:01,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526390418] [2021-05-02 19:31:01,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:01,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:01,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:01,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:01,221 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:31:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:01,382 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-02 19:31:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 19:31:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:01,383 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:31:01,383 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:31:01,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:31:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 19:31:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:31:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 19:31:01,389 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2021-05-02 19:31:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:01,389 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 19:31:01,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:31:01,390 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 19:31:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:31:01,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:01,390 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:01,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:01,606 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:01,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-02 19:31:01,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:01,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718605211] [2021-05-02 19:31:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:01,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:01,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608604206] [2021-05-02 19:31:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:31:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:31:01,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:01,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718605211] [2021-05-02 19:31:01,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:01,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608604206] [2021-05-02 19:31:01,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608604206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:01,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:01,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:01,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945046170] [2021-05-02 19:31:01,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:01,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:01,752 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:31:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:01,877 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:31:01,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:31:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:01,879 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:31:01,879 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:31:01,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:31:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:31:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:31:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:31:01,885 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:31:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:01,885 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:31:01,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:31:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:31:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:31:01,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:01,886 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] [2021-05-02 19:31:02,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:02,101 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-02 19:31:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:02,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156992296] [2021-05-02 19:31:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:02,113 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:02,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930513983] [2021-05-02 19:31:02,113 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 [2021-05-02 19:31:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:02,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:31:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:31:02,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:02,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156992296] [2021-05-02 19:31:02,346 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:02,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930513983] [2021-05-02 19:31:02,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930513983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:02,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:02,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:31:02,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126949008] [2021-05-02 19:31:02,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:31:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:31:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:02,348 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:31:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:02,549 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:31:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:31:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 19:31:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:02,551 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:31:02,551 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:31:02,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:31:02,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 19:31:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:31:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-02 19:31:02,555 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2021-05-02 19:31:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:02,555 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-02 19:31:02,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:31:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-02 19:31:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:31:02,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:02,556 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:02,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:02,776 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-02 19:31:02,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:02,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297129107] [2021-05-02 19:31:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:02,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:02,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263133196] [2021-05-02 19:31:02,784 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 [2021-05-02 19:31:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:31:02,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:02,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 19:31:02,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:02,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297129107] [2021-05-02 19:31:02,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:02,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263133196] [2021-05-02 19:31:02,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263133196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:02,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:02,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:31:02,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672684089] [2021-05-02 19:31:02,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:31:02,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:31:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:31:02,948 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:02,977 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-05-02 19:31:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:31:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:31:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:02,978 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:31:02,978 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:31:02,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:31:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:31:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:31:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-02 19:31:02,981 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-02 19:31:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:02,982 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-02 19:31:02,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-02 19:31:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:31:02,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:02,983 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:03,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:03,199 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:03,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2021-05-02 19:31:03,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:03,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124800029] [2021-05-02 19:31:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:03,206 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:03,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923820292] [2021-05-02 19:31:03,206 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 [2021-05-02 19:31:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:31:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:31:03,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124800029] [2021-05-02 19:31:03,414 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923820292] [2021-05-02 19:31:03,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923820292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:03,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:03,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:31:03,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227138954] [2021-05-02 19:31:03,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:31:03,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:03,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:31:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:31:03,416 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:03,684 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-05-02 19:31:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:31:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:03,685 INFO L225 Difference]: With dead ends: 76 [2021-05-02 19:31:03,685 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 19:31:03,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:31:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 19:31:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 19:31:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:31:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-05-02 19:31:03,690 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2021-05-02 19:31:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:03,691 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-05-02 19:31:03,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:31:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-05-02 19:31:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:31:03,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:03,692 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:03,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:03,907 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2021-05-02 19:31:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:03,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739091064] [2021-05-02 19:31:03,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:03,913 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:03,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298056997] [2021-05-02 19:31:03,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:03,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:31:03,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:03,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:31:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:31:04,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739091064] [2021-05-02 19:31:04,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:04,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298056997] [2021-05-02 19:31:04,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298056997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:04,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:04,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:31:04,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358833231] [2021-05-02 19:31:04,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:31:04,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:04,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:31:04,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:31:04,067 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:31:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:04,224 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-05-02 19:31:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 19:31:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:04,225 INFO L225 Difference]: With dead ends: 80 [2021-05-02 19:31:04,226 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:31:04,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:31:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:31:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:31:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-05-02 19:31:04,230 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 50 [2021-05-02 19:31:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:04,230 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-05-02 19:31:04,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:31:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-05-02 19:31:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:31:04,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:04,231 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2021-05-02 19:31:04,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:04,446 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:04,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:04,447 INFO L82 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2021-05-02 19:31:04,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:04,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067229730] [2021-05-02 19:31:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:04,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:04,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897854276] [2021-05-02 19:31:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:31:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:31:04,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:04,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067229730] [2021-05-02 19:31:04,890 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:04,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897854276] [2021-05-02 19:31:04,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897854276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:04,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:04,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:04,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754749473] [2021-05-02 19:31:04,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:04,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:04,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:04,891 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:05,088 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 19:31:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-05-02 19:31:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:05,090 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:31:05,090 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:31:05,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:31:05,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:31:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-05-02 19:31:05,094 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 71 [2021-05-02 19:31:05,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:05,095 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-05-02 19:31:05,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:05,095 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-05-02 19:31:05,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:31:05,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:05,096 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:05,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:31:05,311 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:05,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2021-05-02 19:31:05,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:05,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72782860] [2021-05-02 19:31:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:05,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:05,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089809055] [2021-05-02 19:31:05,320 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 [2021-05-02 19:31:05,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:31:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:31:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 19:31:05,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:05,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72782860] [2021-05-02 19:31:05,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:05,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089809055] [2021-05-02 19:31:05,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089809055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:05,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:05,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:31:05,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998574054] [2021-05-02 19:31:05,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:31:05,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:31:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:31:05,476 INFO L87 Difference]: Start difference. First operand 82 states and 98 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, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:05,529 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-02 19:31:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:31:05,530 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, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:31:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:05,531 INFO L225 Difference]: With dead ends: 90 [2021-05-02 19:31:05,531 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 19:31:05,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:31:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 19:31:05,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-05-02 19:31:05,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:31:05,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-02 19:31:05,535 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 73 [2021-05-02 19:31:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:05,535 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-02 19:31:05,535 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, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-02 19:31:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:31:05,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:05,536 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:05,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:31:05,751 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2049786824, now seen corresponding path program 3 times [2021-05-02 19:31:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691461997] [2021-05-02 19:31:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:05,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:05,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383139042] [2021-05-02 19:31:05,757 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:05,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:31:05,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:31:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:31:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:31:05,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:05,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691461997] [2021-05-02 19:31:05,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:05,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383139042] [2021-05-02 19:31:05,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383139042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:05,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:05,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:05,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864023396] [2021-05-02 19:31:05,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:05,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:05,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:05,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:05,992 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:06,235 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-05-02 19:31:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:06,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:31:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:06,236 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:31:06,236 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:31:06,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:31:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 19:31:06,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 58 states have internal predecessors, (61), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:31:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2021-05-02 19:31:06,241 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 73 [2021-05-02 19:31:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2021-05-02 19:31:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:31:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2021-05-02 19:31:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 19:31:06,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:06,242 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:06,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:06,461 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2021-05-02 19:31:06,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:06,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933993857] [2021-05-02 19:31:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:06,466 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107452868] [2021-05-02 19:31:06,466 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 [2021-05-02 19:31:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:31:06,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:31:06,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:31:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:31:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 19:31:06,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:31:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933993857] [2021-05-02 19:31:06,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:31:06,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107452868] [2021-05-02 19:31:06,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107452868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:31:06,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:31:06,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:31:06,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362846180] [2021-05-02 19:31:06,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:31:06,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:31:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:31:06,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:31:06,695 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:31:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:31:06,858 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2021-05-02 19:31:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:31:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-02 19:31:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:31:06,860 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:31:06,860 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 19:31:06,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:31:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 19:31:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 19:31:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 37 states have call successors, (37), 16 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:31:06,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2021-05-02 19:31:06,865 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 76 [2021-05-02 19:31:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:31:06,865 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2021-05-02 19:31:06,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:31:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2021-05-02 19:31:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 19:31:06,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:31:06,866 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:31:07,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:31:07,082 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:31:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:31:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2021-05-02 19:31:07,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:31:07,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588909136] [2021-05-02 19:31:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:31:07,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:31:07,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102928141] [2021-05-02 19:31:07,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true