/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/divbin2_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:41:58,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:41:58,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:41:58,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:41:58,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:41:58,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:41:58,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:41:58,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:41:58,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:41:58,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:41:58,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:41:58,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:41:58,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:41:58,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:41:58,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:41:58,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:41:58,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:41:58,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:41:58,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:41:58,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:41:58,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:41:58,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:41:58,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:41:58,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:41:58,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:41:58,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:41:58,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:41:58,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:41:58,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:41:58,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:41:58,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:41:58,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:41:58,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:41:58,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:41:58,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:41:58,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:41:58,444 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:41:58,444 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:41:58,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:41:58,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:41:58,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:41:58,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:41:58,766 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:41:58,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound100.i [2021-05-06 07:41:58,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b1b8aa9f/86505718b9814dc9b493da04409cf319/FLAG0a3353324 [2021-05-06 07:41:59,166 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:41:59,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound100.i [2021-05-06 07:41:59,171 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b1b8aa9f/86505718b9814dc9b493da04409cf319/FLAG0a3353324 [2021-05-06 07:41:59,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b1b8aa9f/86505718b9814dc9b493da04409cf319 [2021-05-06 07:41:59,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:41:59,602 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:41:59,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:41:59,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:41:59,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:41:59,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd5306c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59, skipping insertion in model container [2021-05-06 07:41:59,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:41:59,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:41:59,723 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/divbin2_unwindbound100.i[959,972] [2021-05-06 07:41:59,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:41:59,750 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:41:59,774 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/divbin2_unwindbound100.i[959,972] [2021-05-06 07:41:59,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:41:59,811 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:41:59,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59 WrapperNode [2021-05-06 07:41:59,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:41:59,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:41:59,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:41:59,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:41:59,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (1/1) ... [2021-05-06 07:41:59,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:41:59,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:41:59,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:41:59,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:41:59,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (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 [2021-05-06 07:41:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:41:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:41:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:41:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:41:59,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:41:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:41:59,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:41:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:41:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:41:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:42:00,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:42:00,164 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:42:00,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:00 BoogieIcfgContainer [2021-05-06 07:42:00,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:42:00,165 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:42:00,165 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:42:00,166 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:42:00,167 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:00" (1/1) ... [2021-05-06 07:42:00,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:00 BasicIcfg [2021-05-06 07:42:00,176 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:42:00,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:42:00,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:42:00,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:42:00,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:41:59" (1/4) ... [2021-05-06 07:42:00,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b229804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:00, skipping insertion in model container [2021-05-06 07:42:00,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:41:59" (2/4) ... [2021-05-06 07:42:00,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b229804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:00, skipping insertion in model container [2021-05-06 07:42:00,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:00" (3/4) ... [2021-05-06 07:42:00,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b229804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:42:00, skipping insertion in model container [2021-05-06 07:42:00,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:00" (4/4) ... [2021-05-06 07:42:00,186 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.iJordan [2021-05-06 07:42:00,189 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:42:00,192 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:42:00,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:42:00,212 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:42:00,212 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:42:00,212 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:42:00,212 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:42:00,213 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:42:00,213 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:42:00,213 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:42:00,213 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:42:00,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:42:00,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:00,238 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:00,238 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:00,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:00,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-06 07:42:00,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:00,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981395792] [2021-05-06 07:42:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:00,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:00,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981395792] [2021-05-06 07:42:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981395792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:00,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:00,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68861241] [2021-05-06 07:42:00,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:00,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:00,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:00,373 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:00,417 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-06 07:42:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:00,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:42:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:00,423 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:00,423 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 07:42:00,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 07:42:00,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 07:42:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-06 07:42:00,444 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-06 07:42:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:00,445 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-06 07:42:00,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-06 07:42:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 07:42:00,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:00,446 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:00,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:42:00,446 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:00,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-06 07:42:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50102821] [2021-05-06 07:42:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:00,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:00,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:00,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50102821] [2021-05-06 07:42:00,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50102821] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:00,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:00,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:42:00,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950623873] [2021-05-06 07:42:00,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:00,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:00,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:00,517 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:00,581 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-06 07:42:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 07:42:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:00,582 INFO L225 Difference]: With dead ends: 23 [2021-05-06 07:42:00,582 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:42:00,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:00,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:42:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:42:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-06 07:42:00,585 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-06 07:42:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:00,585 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-06 07:42:00,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-06 07:42:00,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:00,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:00,586 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:00,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:42:00,586 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:00,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:00,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-06 07:42:00,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:00,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74394436] [2021-05-06 07:42:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:00,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:00,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177181348] [2021-05-06 07:42:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:00,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:00,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:00,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74394436] [2021-05-06 07:42:00,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:00,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177181348] [2021-05-06 07:42:00,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177181348] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:00,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:00,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:42:00,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922836287] [2021-05-06 07:42:00,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:00,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:00,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:00,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:00,903 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:00,925 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 07:42:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:42:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2021-05-06 07:42:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:00,927 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:00,927 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:42:00,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:42:00,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:42:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:00,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-06 07:42:00,933 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-06 07:42:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:00,933 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-06 07:42:00,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-06 07:42:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:00,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:00,935 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:01,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:42:01,149 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-06 07:42:01,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:01,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024081493] [2021-05-06 07:42:01,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:01,168 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:01,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110443262] [2021-05-06 07:42:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:01,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:01,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:01,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:01,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024081493] [2021-05-06 07:42:01,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:01,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110443262] [2021-05-06 07:42:01,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110443262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:01,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:01,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:42:01,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22737064] [2021-05-06 07:42:01,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:01,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:01,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:01,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:01,390 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:01,433 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-06 07:42:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:01,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:01,435 INFO L225 Difference]: With dead ends: 33 [2021-05-06 07:42:01,436 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:42:01,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:42:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:42:01,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 07:42:01,443 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-06 07:42:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:01,444 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 07:42:01,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 07:42:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:42:01,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:01,446 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:01,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:01,665 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-06 07:42:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:01,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540867836] [2021-05-06 07:42:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:01,674 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:01,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145564583] [2021-05-06 07:42:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:01,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:01,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540867836] [2021-05-06 07:42:01,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:01,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145564583] [2021-05-06 07:42:01,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145564583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:01,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:01,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:42:01,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511687409] [2021-05-06 07:42:01,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:01,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:01,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:01,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:01,760 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:01,779 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:42:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:01,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 07:42:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:01,779 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:42:01,779 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:42:01,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:42:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:42:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 07:42:01,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-06 07:42:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:01,782 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 07:42:01,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:01,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 07:42:01,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:01,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:01,783 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:02,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:02,001 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-06 07:42:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:02,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802981681] [2021-05-06 07:42:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:02,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:02,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215730535] [2021-05-06 07:42:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:42:02,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:02,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:02,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:02,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802981681] [2021-05-06 07:42:02,120 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:02,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215730535] [2021-05-06 07:42:02,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215730535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:02,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:02,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896871090] [2021-05-06 07:42:02,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:02,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:02,121 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:02,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:02,149 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-06 07:42:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:42:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (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 18 [2021-05-06 07:42:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:02,150 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:42:02,150 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:42:02,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:42:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:42:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-06 07:42:02,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-06 07:42:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:02,154 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-06 07:42:02,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-06 07:42:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:02,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:02,155 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:02,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:02,376 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2021-05-06 07:42:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:02,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846257903] [2021-05-06 07:42:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:02,384 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:02,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45906761] [2021-05-06 07:42:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:02,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:02,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:02,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846257903] [2021-05-06 07:42:02,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:02,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45906761] [2021-05-06 07:42:02,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45906761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:02,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:02,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:02,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56904846] [2021-05-06 07:42:02,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:02,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:02,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:02,510 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:02,560 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-05-06 07:42:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:02,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:02,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:02,561 INFO L225 Difference]: With dead ends: 50 [2021-05-06 07:42:02,561 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:42:02,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:42:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-06 07:42:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 07:42:02,564 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-06 07:42:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:02,564 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 07:42:02,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 07:42:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:42:02,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:02,565 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:02,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:42:02,782 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2021-05-06 07:42:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:02,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260364878] [2021-05-06 07:42:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:02,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:02,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716213852] [2021-05-06 07:42:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:02,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:42:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:02,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260364878] [2021-05-06 07:42:02,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716213852] [2021-05-06 07:42:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716213852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:02,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:02,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800413670] [2021-05-06 07:42:02,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:02,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:02,893 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:02,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:02,901 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 07:42:02,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:02,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 07:42:02,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:02,902 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:42:02,902 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:42:02,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:02,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:42:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:42:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 07:42:02,904 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-06 07:42:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:02,904 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 07:42:02,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 07:42:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:02,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:02,905 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:03,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:03,121 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-06 07:42:03,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:03,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945807214] [2021-05-06 07:42:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:03,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:03,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052964967] [2021-05-06 07:42:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:03,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:42:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:03,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945807214] [2021-05-06 07:42:03,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052964967] [2021-05-06 07:42:03,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052964967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:03,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:03,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:42:03,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521928228] [2021-05-06 07:42:03,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:42:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:42:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:03,244 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:03,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:03,275 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-06 07:42:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:42:03,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 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 27 [2021-05-06 07:42:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:03,276 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:42:03,276 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:42:03,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:42:03,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:42:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-06 07:42:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-06 07:42:03,278 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-06 07:42:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:03,279 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-06 07:42:03,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-06 07:42:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:03,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:03,279 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:03,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:03,496 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2021-05-06 07:42:03,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:03,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507137090] [2021-05-06 07:42:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:03,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:03,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188150811] [2021-05-06 07:42:03,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true