/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/geo2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:50:44,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:50:44,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:50:44,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:50:44,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:50:44,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:50:44,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:50:44,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:50:44,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:50:44,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:50:44,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:50:44,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:50:44,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:50:44,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:50:44,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:50:44,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:50:44,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:50:44,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:50:44,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:50:44,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:50:44,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:50:44,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:50:44,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:50:44,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:50:44,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:50:44,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:50:44,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:50:44,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:50:44,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:50:44,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:50:44,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:50:44,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:50:44,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:50:44,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:50:44,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:50:44,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:50:44,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:50:44,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:50:44,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:50:44,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:50:44,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:50:44,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:50:44,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:50:44,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:50:44,557 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:50:44,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:50:44,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:50:44,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:50:44,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:50:44,899 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:50:44,900 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:50:44,901 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-02 20:50:44,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0fec7ff4/803037a203a84a89af2dd3217f526562/FLAG28d68fb84 [2021-05-02 20:50:45,367 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:50:45,368 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-02 20:50:45,373 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0fec7ff4/803037a203a84a89af2dd3217f526562/FLAG28d68fb84 [2021-05-02 20:50:45,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0fec7ff4/803037a203a84a89af2dd3217f526562 [2021-05-02 20:50:45,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:50:45,394 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:50:45,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:45,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:50:45,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:50:45,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f201a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45, skipping insertion in model container [2021-05-02 20:50:45,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:50:45,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:50:45,532 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/geo2-ll_unwindbound10.c[525,538] [2021-05-02 20:50:45,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:45,553 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:50:45,595 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/geo2-ll_unwindbound10.c[525,538] [2021-05-02 20:50:45,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:50:45,628 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:50:45,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45 WrapperNode [2021-05-02 20:50:45,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:50:45,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:50:45,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:50:45,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:50:45,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (1/1) ... [2021-05-02 20:50:45,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:50:45,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:50:45,681 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:50:45,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:50:45,682 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (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 20:50:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:50:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:50:45,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:50:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:50:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:50:45,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:50:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:50:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:50:45,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:50:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:50:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:50:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:50:45,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:50:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:50:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:50:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:50:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:50:45,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:50:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:50:45,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:50:46,027 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:50:46,027 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:50:46,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:46 BoogieIcfgContainer [2021-05-02 20:50:46,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:50:46,029 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:50:46,029 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:50:46,029 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:50:46,032 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:46" (1/1) ... [2021-05-02 20:50:46,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:46 BasicIcfg [2021-05-02 20:50:46,057 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:50:46,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:50:46,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:50:46,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:50:46,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:50:45" (1/4) ... [2021-05-02 20:50:46,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb4c656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:46, skipping insertion in model container [2021-05-02 20:50:46,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:50:45" (2/4) ... [2021-05-02 20:50:46,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb4c656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:50:46, skipping insertion in model container [2021-05-02 20:50:46,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:50:46" (3/4) ... [2021-05-02 20:50:46,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bb4c656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:50:46, skipping insertion in model container [2021-05-02 20:50:46,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:50:46" (4/4) ... [2021-05-02 20:50:46,064 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.cJordan [2021-05-02 20:50:46,068 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:50:46,071 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:50:46,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:50:46,103 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:50:46,103 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:50:46,103 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:50:46,103 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:50:46,103 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:50:46,103 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:50:46,103 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:50:46,104 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:50:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-02 20:50:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 20:50:46,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:46,131 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:46,132 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:46,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-02 20:50:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:46,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941047037] [2021-05-02 20:50:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:46,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:50:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:46,428 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 20:50:46,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941047037] [2021-05-02 20:50:46,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941047037] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:50:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:50:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:50:46,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811992884] [2021-05-02 20:50:46,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:50:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:50:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:46,450 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 2.3333333333333335) 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 20:50:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:46,532 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-02 20:50:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:50:46,535 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 20:50:46,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:46,547 INFO L225 Difference]: With dead ends: 23 [2021-05-02 20:50:46,548 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 20:50:46,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:50:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 20:50:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 20:50:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-02 20:50:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 20:50:46,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 20:50:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:46,579 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 20:50:46,580 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 20:50:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 20:50:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:50:46,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:46,581 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:46,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:50:46,582 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:46,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-02 20:50:46,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:46,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836430600] [2021-05-02 20:50:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:46,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608600473] [2021-05-02 20:50:46,609 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 20:50:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:50:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:46,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:46,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:46,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:46,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:46,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:46,862 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 20:50:46,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836430600] [2021-05-02 20:50:46,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:46,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608600473] [2021-05-02 20:50:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608600473] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:50:46,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:50:46,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:50:46,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396577382] [2021-05-02 20:50:46,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:50:46,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:50:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:50:46,866 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 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 20:50:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:46,874 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-02 20:50:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:50:46,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 20:50:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:46,876 INFO L225 Difference]: With dead ends: 19 [2021-05-02 20:50:46,876 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 20:50:46,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:50:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 20:50:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 20:50:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-05-02 20:50:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 20:50:46,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 20:50:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:46,880 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 20:50:46,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 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 20:50:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 20:50:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 20:50:46,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:46,881 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:47,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:50:47,100 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-02 20:50:47,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:47,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380362336] [2021-05-02 20:50:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:47,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:47,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805484405] [2021-05-02 20:50:47,109 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 20:50:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 20:50:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:47,199 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 20:50:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380362336] [2021-05-02 20:50:47,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805484405] [2021-05-02 20:50:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805484405] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:50:47,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:50:47,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:50:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668666486] [2021-05-02 20:50:47,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:50:47,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:50:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:50:47,202 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:50:47,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:47,229 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 20:50:47,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:50:47,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 20:50:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:47,230 INFO L225 Difference]: With dead ends: 26 [2021-05-02 20:50:47,230 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:50:47,230 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:50:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:50:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:50:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-02 20:50:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 20:50:47,235 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 20:50:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:47,235 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 20:50:47,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 20:50:47,235 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 20:50:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:50:47,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:47,236 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:47,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:47,459 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:47,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-02 20:50:47,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:47,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212847865] [2021-05-02 20:50:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:47,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:47,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865387318] [2021-05-02 20:50:47,472 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 20:50:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:47,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:50:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:47,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:50:47,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212847865] [2021-05-02 20:50:47,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865387318] [2021-05-02 20:50:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865387318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:47,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:47,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:50:47,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27894700] [2021-05-02 20:50:47,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:50:47,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:50:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:50:47,665 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (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) [2021-05-02 20:50:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:47,702 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-02 20:50:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:50:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (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 20 [2021-05-02 20:50:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:47,705 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:50:47,705 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:50:47,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:50:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:50:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:50:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-02 20:50:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 20:50:47,716 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 20:50:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:47,717 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 20:50:47,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (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) [2021-05-02 20:50:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 20:50:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:50:47,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:47,718 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:47,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:47,925 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:47,926 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-02 20:50:47,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:47,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616614698] [2021-05-02 20:50:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:47,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:47,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445601338] [2021-05-02 20:50:47,935 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 20:50:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:50:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:50:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:48,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:50:48,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:48,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616614698] [2021-05-02 20:50:48,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:48,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445601338] [2021-05-02 20:50:48,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445601338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:48,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:48,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:50:48,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105519396] [2021-05-02 20:50:48,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:50:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:50:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:48,160 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 20:50:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:48,280 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 20:50:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 20 [2021-05-02 20:50:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:48,282 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:50:48,282 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:50:48,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:50:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:50:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 20:50:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-05-02 20:50:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 20:50:48,286 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 20:50:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:48,287 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 20:50:48,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 20:50:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 20:50:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:50:48,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:48,288 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:48,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:50:48,489 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-02 20:50:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707715682] [2021-05-02 20:50:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:48,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:48,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740196138] [2021-05-02 20:50:48,500 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 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 20:50:48,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:50:48,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:48,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:50:48,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:48,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707715682] [2021-05-02 20:50:48,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:48,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740196138] [2021-05-02 20:50:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740196138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:50:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247364666] [2021-05-02 20:50:48,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:50:48,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:50:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:50:48,648 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:50:48,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:50:48,689 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-02 20:50:48,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:50:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:50:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:50:48,691 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:50:48,691 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:50:48,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:50:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:50:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:50:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-05-02 20:50:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 20:50:48,698 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 20:50:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:50:48,699 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 20:50:48,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:50:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 20:50:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:50:48,700 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:50:48,700 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:50:48,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:50:48,913 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:50:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:50:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-02 20:50:48,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:50:48,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659677593] [2021-05-02 20:50:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:50:48,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:50:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609240868] [2021-05-02 20:50:48,919 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 20:50:48,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:50:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:50:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:50:48,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:50:57,143 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 13 [2021-05-02 20:50:57,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:50:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:50:57,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:50:57,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659677593] [2021-05-02 20:50:57,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:50:57,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609240868] [2021-05-02 20:50:57,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609240868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:50:57,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:50:57,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:50:57,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514852002] [2021-05-02 20:50:57,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:50:57,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:50:57,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:50:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 20:50:57,205 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:23,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:23,485 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-02 20:51:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:51:23,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 20:51:23,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:23,487 INFO L225 Difference]: With dead ends: 42 [2021-05-02 20:51:23,487 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:51:23,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 8174.4ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 20:51:23,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:51:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:51:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:51:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 20:51:23,491 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2021-05-02 20:51:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:23,492 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 20:51:23,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 20:51:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 20:51:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 20:51:23,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:23,505 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:23,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:23,724 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1187551519, now seen corresponding path program 1 times [2021-05-02 20:51:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:23,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945172291] [2021-05-02 20:51:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:23,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:23,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592784434] [2021-05-02 20:51:23,733 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 20:51:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:51:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:51:23,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:23,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:51:23,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:23,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945172291] [2021-05-02 20:51:23,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:23,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592784434] [2021-05-02 20:51:23,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592784434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:23,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:23,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734067036] [2021-05-02 20:51:23,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:51:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:51:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:51:23,895 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:25,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:51:25,975 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-05-02 20:51:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:51:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-05-02 20:51:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:51:25,977 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:51:25,978 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 20:51:25,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:51:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 20:51:25,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 20:51:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:51:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 20:51:25,981 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-02 20:51:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:51:25,982 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 20:51:25,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:51:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 20:51:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:51:25,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:51:25,983 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:51:26,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:51:26,184 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:51:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:51:26,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-02 20:51:26,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:51:26,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671796990] [2021-05-02 20:51:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:51:26,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:51:26,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144998617] [2021-05-02 20:51:26,192 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 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 20:51:26,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:51:26,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:51:26,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:51:26,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:51:30,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:30,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:32,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:51:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:51:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:51:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671796990] [2021-05-02 20:51:34,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:51:34,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144998617] [2021-05-02 20:51:34,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144998617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:51:34,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:51:34,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:51:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883099599] [2021-05-02 20:51:34,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:51:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:51:34,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:51:34,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=42, Unknown=1, NotChecked=0, Total=56 [2021-05-02 20:51:34,166 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:00,088 WARN L205 SmtUtils]: Spent 19.53 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-02 20:52:02,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:02,130 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 20:52:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 20:52:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:02,131 INFO L225 Difference]: With dead ends: 39 [2021-05-02 20:52:02,131 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 20:52:02,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23291.4ms TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-05-02 20:52:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 20:52:02,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 20:52:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 20:52:02,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 20:52:02,132 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 20:52:02,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:02,132 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 20:52:02,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 20:52:02,132 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 20:52:02,132 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 20:52:02,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:52:02,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:02 BasicIcfg [2021-05-02 20:52:02,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:02,336 INFO L168 Benchmark]: Toolchain (without parser) took 76942.91 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 144.6 MB in the beginning and 89.1 MB in the end (delta: 55.5 MB). Peak memory consumption was 91.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,336 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 179.3 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:02,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.96 ms. Allocated memory is still 179.3 MB. Free memory was 144.4 MB in the beginning and 162.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,336 INFO L168 Benchmark]: Boogie Preprocessor took 47.73 ms. Allocated memory is still 179.3 MB. Free memory was 162.4 MB in the beginning and 160.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,337 INFO L168 Benchmark]: RCFGBuilder took 347.20 ms. Allocated memory is still 179.3 MB. Free memory was 160.9 MB in the beginning and 146.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,337 INFO L168 Benchmark]: IcfgTransformer took 28.62 ms. Allocated memory is still 179.3 MB. Free memory was 146.7 MB in the beginning and 145.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,337 INFO L168 Benchmark]: TraceAbstraction took 76277.19 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 145.1 MB in the beginning and 89.1 MB in the end (delta: 56.0 MB). Peak memory consumption was 93.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:02,337 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 179.3 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.96 ms. Allocated memory is still 179.3 MB. Free memory was 144.4 MB in the beginning and 162.4 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.73 ms. Allocated memory is still 179.3 MB. Free memory was 162.4 MB in the beginning and 160.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.20 ms. Allocated memory is still 179.3 MB. Free memory was 160.9 MB in the beginning and 146.7 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.62 ms. Allocated memory is still 179.3 MB. Free memory was 146.7 MB in the beginning and 145.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 76277.19 ms. Allocated memory was 179.3 MB in the beginning and 216.0 MB in the end (delta: 36.7 MB). Free memory was 145.1 MB in the beginning and 89.1 MB in the end (delta: 56.0 MB). Peak memory consumption was 93.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 76232.4ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 26.0ms, AutomataDifference: 56693.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 158 SDtfs, 72 SDslu, 500 SDs, 0 SdLazy, 272 SolverSat, 23 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 36402.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 31721.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 81.9ms SsaConstructionTime, 254.3ms SatisfiabilityAnalysisTime, 16987.9ms InterpolantComputationTime, 201 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 714 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1071 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 77/109 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...